# Working with .bib files
It's possible to include references in Overleaf using all of LaTeX's major bibliography management programs: biblatex, natbib, and bibtex. This article explains how to:
* manually create a new `.bib` file for storing your bibliography database
* upload an existing `.bib` file into your Overleaf project
* create a `.bib` file starting from an Overleaf template
{% hint style="success" %}
Users of Overleaf Premium can access features that allow them to link [Mendeley](/integrations-and-add-ons/reference-manager-integrations/mendeley.md), [Zotero](/integrations-and-add-ons/reference-manager-integrations/zotero.md), and [Papers](/integrations-and-add-ons/reference-manager-integrations/papers.md) to their Overleaf account. By connecting these reference managers, you can easily create `.bib` files by bulk-importing reference libraries or using [advanced search](/citing-and-references/adding-citations-and-references.md) to find and import individual references.
{% endhint %}
## Creating your bibliography database
To create a new bibliography file in your Overleaf project, in the editor, click the **New File** icon:
An input box will appear for you to enter the name of the new file. The file should have the `.bib` extension. In this example it is called `mybibliography.bib`. Now click **Create**.
A new file will be listed in the left panel. Click it to edit its contents. Add your bibliography entries there.
Now you can import this `.bib` file in the main `.tex` file. See the next example.
```latex
\documentclass{article}
\usepackage[
backend=biber,
style=alphabetic,
sorting=ynt
]{biblatex}
\addbibresource{mybibliography.bib}
\title{Bibliography management: \texttt{biblatex} package}
\author{Share\LaTeX}
\date{ }
\begin{document}
\maketitle
\section{First section}
Using \texttt{biblatex} you can display bibliography divided into sections,
depending of citation type.
Let's cite! The Einstein's journal paper \cite{einstein} and the Dirac's
book \cite{dirac} are physics related items.
Next, \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the
Donald Knuth's website \cite{knuthwebsite}, \textit{The Comprehensive
Tex Archive Network} (CTAN) \cite{ctan} are \LaTeX\ related items; but
the others Donald Knuth's items \cite{knuth-fa,knuth-acp} are dedicated
to programming.
\medskip
\printbibliography
\end{document}
```
The command `\addbibresource{mybibliography.bib}` adds the created bibliography file to the document so you can use those references. See [Bibliography management in LaTeX](https://www.overleaf.com/learn/latex/Bibliography_management_in_LaTeX) for more information about bibliography management.
## Uploading your bibliography database
If you already have a bibliography file that you need to use in an Overleaf project, you can upload it. Click the **Upload** icon located on top of the left panel.
A dialog box will appear, you can either drag and drop the `.bib` file(s), or choose **select from your computer** to upload file(s) from your device.
Once the upload process is finished you can include the `.bib` file in your main `.tex` document.
## Using a template
The [Overleaf Gallery](https://www.overleaf.com/gallery) provides a large collection of templates, including several [bibliography-related](https://www.overleaf.com/gallery?addsearch=Bibliographies) templates:
For example, a Gallery search lists the entry [Multiple bibliographies with bibunits](https://www.overleaf.com/latex/examples/multiple-bibliographies-with-bibunits/ktgbztpwjnpb) which shows how to create multiple bibliographies/reference lists in the same document:
If you select **Open as Template**, Overleaf will create a new project which you can modify and use as a basis for your work:
## Supported bibliography management systems
For more information about bibliography management in LaTeX see:
* [Bibliography management in LaTeX (using biblatex)](https://learn.overleaf.com/learn/Bibliography_management_in_LaTeX)
* [Bibliography management with natbib](https://learn.overleaf.com/learn/Bibliography_management_with_natbib)
* [Bibliography management with bibtex](https://learn.overleaf.com/learn/Bibliography_management_with_bibtex)
---
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```
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```
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