The Citation Style Language (CSL) was created by Bruce D’Arcus, and shaped by early contributions from Simon Kornblith of Zotero. In recent years Frank G. Bennett, Jr. and Rintze M. Zelle have spearheaded further development. The CSL styles and locales repositories on GitHub are maintained by Rintze Zelle and Sebastian Karcher. Other contributors include:

The contents of this website is by Rintze Zelle.

CSL Supporters

The open source CSL project has enjoyed the support of several patrons:

 Zotero - Even though CSL and Zotero are independent projects, their roots have always been firmly intertwined. Zotero was the first program to adopt CSL, and Zotero-developer Simon Kornblith contributed to the core design of CSL. Many other CSL contributors (including Frank, Rintze, and Sebastian) first became aware of CSL through their use of Zotero. Zotero also maintained the first repository of CSL styles, which formed the basis of the current CSL styles repository on GitHub. In addition, the Roy Rosenzweig Center for History and New Media at George Mason University, the creators of Zotero, kindly hosts this website.

Papers - Papers-developer Charles Parnot is an active contributor of CSL styles, and Papers introduced a bounty program to reward those who contribute CSL styles with a Papers license.

Mendeley - Together with Columbia University Libraries, Mendeley obtained an Alfred P. Sloan Foundation grant to build a CSL style editor. The editor was built by Steve Ridout. Mendeley-developer Carles Pina is an active contributor of CSL styles. In early 2014, Mendeley and Elsevier donated $5000 to the CSL project.


Thanks to Johannes Krtek, CSL now has some excellent logos:

Full logo Small logo
Full Logo Small Logo

Additional logo variants, and SVG source files, can be found in the logo repository.

CSL in the News

Supporting CSL

Looking for ways to support CSL? You can help us in many ways:

  • Become a CSL style author. Learn CSL, create new CSL styles, and improve existing ones. Follow e.g. the Zotero forums to find out which styles are being requested, and help users with their CSL questions.
  • Get involved in CSL development. Take part in CSL development. Report missing features, help us design and implement new features, write new CSL documentation, or work on the CSL processors.
  • Mention us. If you are a developer and use CSL in your software, please drop us a line and acknowledge the use of CSL in your software (please use the unabbreviated “Citation Style Language”, since “CSL” is a common acronym). Also, if you distribute CSL styles from our style repository, make sure to comply with their Creative Commons BY-SA license.
  • Financially. We currently aren’t set up very well to accept personal donations (e.g., the CSL project is not registered as a non-profit organization). However, if you wish to support the open source community around CSL, consider signing up for Zotero File Storage (the preferred way to donate to Zotero) as a token of appreciation for their continuing contributions to CSL, which includes hosting CitationStyles.org and the Zotero Style Repository. Or buy Frank Bennett’s book on Multilingual Zotero, Citations, Out of the Box: Adapting Zotero for legal and multilingual research.