Patrick O'Brien - Gründer von Citation Styler

Patrick O'Brien – Zotero Expert & CSL Specialist

Founder of citationstyler.com. CSL & Zotero expert.

I develop citation styles for Zotero that comply exactly with the guidelines of your university or journal. As one of the main contributors to the official CSL repository, I have created over 1,000 Zotero styles — and I can help you find the right one for your work.

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Years of experience

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citation styles created

Top contributor

to the CSL project

contributions on GitHub
Meine Aktivitäten auf GitHub visualisiert. Zitierstile entwickelt, ausgebessert und publiziert.

How it all began

In 2009, I faced the same problem that many students are familiar with: my university required a specific citation style — and that was nowhere to be found.

So I took a look at the Citation Style Language (CSL) and thought it to myself in order to program my own style. First for myself, then for my fellow students. Then for a journal to which I submitted a paper from my doctoral thesis.

Over the years, this has become a mission: I bridge the gap between the citation guidelines set by universities and journals and what is actually available in Zotero. Today, I am one of the top contributor of the CSL team and have created more than 1,000 styles for free and published them.

Are you looking for a Zotero style developer? With Citation Styler, I offer tried-and-tested, ready-to-use styles so that you can focus on your research, not on formatting.

What I offer

The right style for every need

Ready-made Zotero styles in my shop


Verified citation styles for universities — install now and cite correctly. Each style comes with specific examples and version details.

Bespoke citation style


Does your university or journal have specific guidelines?

I develop a bespoke CSL style that fits perfectly.

Zotero Support & Training


From setting it up to creating a bibliography or managing complex workflows — I’ll help you use Zotero efficiently.

Customer testimonials

What others say

"It works and makes life much easier. Plus, the support via email is very quick and friendly."

Hillna Flerke

Student

"Works brilliantly, incredibly helpful, and I got a reply very quickly when I had any questions." "That saved me a lot of time and hassle..."

Stefan Nießen

Student

"Sehr freundliche und zügige Hilfe bei Anwendungsfehlern 😉 Ebenso auf Wunsch Anpassung des Zitationsstils und erneute Zusendung der Datei. Vielen Dank nochmal 🙂 Wirklich sehr weiterzuempfehlen!"

Isabell Wiechmann

Student

Ready to cite correctly, or do you have any further questions?


Whether you’re looking for a ready-made style from the shop or a bespoke design — I’m here to help.

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