Brennan, J. G. (1967). The meaning of philosophy: A survey of the problems of philosophy and of the opinions of philosophers (2nd ed.). Harper & Row.
Chicago-referens (17:e uppl.)Brennan, Joseph Gerard. The Meaning of Philosophy: A Survey of the Problems of Philosophy and of the Opinions of Philosophers. 2nd ed. New York: Harper & Row, 1967.
MLA-referens (9:e uppl.)Brennan, Joseph Gerard. The Meaning of Philosophy: A Survey of the Problems of Philosophy and of the Opinions of Philosophers. 2nd ed. Harper & Row, 1967.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.