Zotero uses Citation Style Language (CSL) styles and the citeproc-js CSL processor for creating citations and bibliographies.

For information on how to use existing CSL styles with Zotero, see Citation Styles.

For basic instructions on how to edit CSL styles for Zotero, see the Step-by-step guide. More documentation can be found at http://citationstyles.org/citation-style-language/documentation/.

If you decide to host CSL styles online yourself, serve them with a “text/x-csl” MIME type allows Zotero for Firefox to automatically recognize and install your styles.

citeproc-node is a wrapper for citeproc-js for server-side rendering of citations and bibliographies.