Philosophy: Get Started

A Dictionary of Philosophy by A. R. Lacey

Encyclopedia of Ethics by Lawrence C. Becker (Editor); Charlotte Becker (Editor)

Encyclopedia of Philosophy

Encyclopedia of Religious Ethics by Maria Antonaccio (Editor); Elizabeth Bucar (Editor); David A. Clairmont (Editor); William Schweiker (Editor)

The Routledge Dictionary of Philosophy by Michael Proudfoot; A. R. Lacey

Routledge Encyclopedia of Philosophy by Edward Craig (Editor)

Stanford Encyclopedia of Philosophy by Edward N. Zalta, et al.