- Oxford Companion to Philosophy
Authoritative and comprehensive reference work.
- Oxford Dictionary of Philosophy (2016)
All areas of philosophy plus terms from religion, science, and logic.
- Oxford Handbook of World Philosophy
Also in print: BD21 .O78 2011 Koerner Stacks / Okanagan Stacks
- Routledge Encyclopedia of Philosophy
Comprehensive with more than 2,000 articles by leading philosophers.
- Stanford Encyclopedia of Philosophy
Continuously updated. Entries and updates are refereed.
- Dictionary of Philosophical Terms and Names
Technical terms and personal names
- Internet Encyclopedia of Philosophy
Detailed, scholarly information on key topics and philosophers.