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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.
+ 10
Years of experience
1.000 +
citation styles created
Top contributor
to the CSL project
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 developed my own style. First for myself, then for 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 provided more than 1,000 styles for free
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.
LinkedIn profile:
GitHub profile:
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.
See styles →Bespoke citation style
Does your university or journal have specific guidelines? I can create a bespoke CSL style that fits perfectly.
Find out more →Zotero Support & Training
From setting it up to creating a bibliography or managing complex workflows — I’ll help you use Zotero efficiently.
Get support →
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 – I got a reply very quickly whenever I had any queries. It saved me a lot of time and stress...’
Stefan Nießen
Student
‘Very friendly and prompt assistance with application errors ;) They also adjusted the citation style as requested and resent the file. Thanks again :) I’d really recommend them!’
Isabell Wiechmann
Student