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## Ref Latex Bibliography Apa

Biblatex provides several standard citations styles, if no citation style is set LaTeX uses the one that matches the bibliography style. Below you can see an example:

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage[ backend=biber, style=alphabetic, citestyle=authoryear ]{biblatex}   \addbibresource{sample.bib}%Imports bibliography file   \begin{document}\section{First section}   This document is an example, two items are cited: \textit{The \LaTeX\ Companion} book is \cite{latexcompanion}, and Einstein's journal paper is \cite{einstein}.   \medskip   \printbibliography\end{document}

The parameter passed to the command that imports biblatex is the one that sets the citation style, in this case authoryear. The standard citation styles are:

• Implements a numeric citation scheme intended for in-text citations. Should be employed in conjunction with the numeric bibliography style.
• Compact variant of the mode. Citations like [1, 2, 3] are replaced by [1-3].
• Verbose variant of the style. Instead of [2, 5, 7] will print [2];[5];[7].
• Alphabetic citation scheme similar to the standard in style bibtex. To be used in conjunction with the alphabetic bibliography style.
• Verbose version of the style. Instead of [Doe98, Doe95, Farn2004] will print [Doe98];[Doe95];[Farn2004].
• Implements the author-year citation scheme. To be used in conjunction with the author-year bibliography style.
• Compact variant of the style. Prints the author only once if subsequent references passed to a single citation command share the same author. Prints Doe 1992, 1995 instead of Doe 1992, Doe 1995.
• A variant of the intended for footnote citations. Replaces repeated citations by the abbreviation ibidem.
• A style combining the features of and
• Implements the author-title scheme. Intended for citations given in footnotes.
• Compact variant of . Instead of Doe, First title; Doe, Second title this will print Doe, First title, Second title.
• A variant of the intended for footnote citations. Replaces repeated citations by the abbreviation ibidem.
• A style combining and .
• Variant of that only prints the title if the bibliography contains more than one work of the respective author/editor.
• Style combining and .
• Style combining and .
• Citation style that prints a full citation when the entry is cited for the first time and a short version afterwards.
• Citation style that goes with the bibliography style by the same name. Loads the style.

There are other non-standard citation styles popular in different journals and thesis

• In Sciences:
• American Chemical Society (ACS) style
• American Institute of Physics (AIP) style
• American Mathematical Society (AMS) style
• Vancouver system
• Institute of Electrical and Electronics Engineers (IEEE) style
• Nature style
• Science style
• In Humanities:
• Chicago Style
• Harvard referencing style
• MLA style
• In Socials:
• American Psychological Association (APA) style
Citation style stylename
ACS
AIP (*)
Nature
Science
IEEE
Chicago
MLA
APA

(*) this is a new style, see http://ctan.org/pkg/biblatex-phys

Open an example of the biblatex package in ShareLaTeX

LaTeX supports bibliographies out of the box, either embedding the references in your document or storing them in an external file. This article explains how to manage bibliography with the environment and the BibTeX system.

Note: If you are starting from scratch it's recommended to use biblatex since that package provides localization in several languages, it's actively developed and makes bibliography management easier and more flexible.

## Introduction

Standard bibliography commands in LaTeX have a similar syntax to that of lists and items.

\begin{thebibliography}{9}\bibitem{latexcompanion} Michel Goossens, Frank Mittelbach, and Alexander Samarin. \textit{The \LaTeX\ Companion}. Addison-Wesley, Reading, Massachusetts, 1993.   \bibitem{einstein} Albert Einstein. \textit{Zur Elektrodynamik bewegter K{\"o}rper}. (German) [\textit{On the electrodynamics of moving bodies}]. Annalen der Physik, 322(10):891–921, 1905.   \bibitem{knuthwebsite} Knuth: Computers and Typesetting, \\\texttt{http://www-cs-faculty.stanford.edu/\~{}uno/abcde.html}\end{thebibliography}

The environment produces a list of references; such list will be titled "References" in a article document class, and "Bibliography" in book and report document classes. A parameter inside braces, in the example, indicates the number of entries to be added; this parameter can not be greater than 99.

To create a bibliography entry the command is used. A parameter inside braces is set to label this entry and can later be used as identifier for this reference. After the closing brace the text with the name of the author, the book title, publisher and so on is entered.

ShareLaTeX provides several templates with pre-defined styles to manage bibliography. See this link

Open an example in ShareLaTeX

## Embedded system

The example presented in the introduction only contains list of references, the next example shows how to cite the entries of that list within the document.

\begin{document}   \section{First section}   This document is an example of \texttt{thebibliography} environment using in bibliography management. Three items are cited: \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Einstein journal paper \cite{einstein}, and the Donald Knuth's website \cite{knuthwebsite}. The \LaTeX\ related items are \cite{latexcompanion,knuthwebsite}.   \medskip   \begin{thebibliography}{9}\bibitem{latexcompanion} Michel Goossens, Frank Mittelbach, and Alexander Samarin. \textit{The \LaTeX\ Companion}. Addison-Wesley, Reading, Massachusetts, 1993.   \bibitem{einstein} Albert Einstein. \textit{Zur Elektrodynamik bewegter K{\"o}rper}. (German) [\textit{On the electrodynamics of moving bodies}]. Annalen der Physik, 322(10):891–921, 1905.   \bibitem{knuthwebsite} Knuth: Computers and Typesetting, \\\texttt{http://www-cs-faculty.stanford.edu/\~{}uno/abcde.html}\end{thebibliography}   \end{document}

The command insert the number corresponding to the bibliography entry whose label is passed inside braces. For example, the output of is [2].

The information printed by the command depends on the bibliography style used. See Bibtex bibliography styles.

Open an example in ShareLaTeX

## Bibliography management with Bibtex

BibTeX is a widely used bibliography management tool in LaTeX, with BibTeX the bibliography entries are kept in a separate file and then imported into the main document.

Once the external bibliography file is imported, the command is used just as in the introductory example.

Ths document is an example of BibTeX using in bibliography management. Three items are cited: \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Einstein journal paper \cite{einstein}, and the Donald Knuth's website \cite{knuthwebsite}. The \LaTeX\ related items are \cite{latexcompanion,knuthwebsite}.   \medskip   \bibliographystyle{unsrt}\bibliography{sample}

This uses the following commands:

Imports the BibTeX file "sample.bib" to display the bibliography. To import several .bib files just write them comma-separated inside the braces, the file extension is not necessary.
Sets the bibliography style to be used in this document. The information displayed depends on the bibliography style used, even if the entry contains information about the date, author, title, publisher, and abstract, the style used might only print the title and the author. See Bibtex bibliography styles which contains examples of the default bibliography styles in LaTeX.
This will print a number of text, depending on the bibliography style, to reference the bibliography entry whose label is passed to the command. In this case, the label produces [2].

When the main document is compiled, a .bbl file is generated from the .bib file. This is simply a .tex file reorganising the information in the .bib file in a environment, as above. On ShareLaTeX the .bbl file is stored in the cache, and you can download it from the list of other logs and files.

Note: Unicode characters are not supported on BibTeX. Also, if there are too many bibliography entries (+100) it may not work properly. See the further reading section for links to other bibliography management tools.

Open an example of the bibtex package in ShareLaTeX

## The bibliography file

Bibliographic references are usually kept in a bibliography file whose extension is .bib, this file consists of a list of records and fields. Each bibliography record holds relevant information for a single entry.

This file contains records in a special format, for instance, the first bibliographic reference is defined by:

This is the first line of a record entry, denotes the entry type and tells BibTeX that the information stored here is about an article. Besides the entry types shown in the example (, and ) there are a lot more, see the reference guide.
The label is assigned to this entry, is an identifier that can be used to refer this article within the document.
This is the first field in the bibliography entry, indicates that the author of this article is Albert Einstein. Several comma-separated fields can be added using the same syntax , for instance: title, pages, year, URL, etc. See the reference guide for a list of possible fields.

The information in this file can later be used within a LaTeX document to include these references, as shown in the next subsection.

Open an example of the bibtex package in ShareLaTeX

There are two ways of including the bibliography in the table of contents, either manually adding it or using the package tocbibind (recommended).

To add it manually just insert the next line right before the command or

for books and reports or

for articles. If you prefer to use tocbibind see the next example.

\documentclass[a4paper,10pt]{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage[nottoc]{tocbibind}   \begin{document}   \tableofcontents   \section{First Section} This document ...   \bibliographystyle{unsrt}\bibliography{sample}   \end{document}

Open an example of the bibtex package in ShareLaTeX

## Reference guide

Standard entry types

Article from a magazine or journal
A published book
A work that is printed but have no publisher or sponsoring institution
An article in a conference proceedings
A part of a book (section, chapter and so on)
A part of a book having its own title
An article in a conference proceedings
Technical documentation
A Master's thesis
Something that doesn't fit in any other type
A PhD thesis
The same as
Document not formally published, with author and title

Most common fields used in BibTeX

 address annote author booktitle chapter crossref edition editor institution journal key month note number organization pages publisher school series title type volume year URL ISBN ISSN LCCN abstract keywords price copyright language contents