The International Encyclopedia of Ethics, 9 Volume Set
Hugh LaFollette
Encyclopedia of Ethics
Lawrence C. Becker & Charlotte B. Becker
Oxford Studies in Philosophy of Language
Ernie Lepore & David Sosa
Encyclopedia Britannica - Revised and Expanded Version
Britannica & Encyclopedia Britannica
Wege der Wissenschaft: Einführung in die Wissenschaftstheorie
Alan Francis Chalmers
A History of Western Philosophy
Bertrand Russell