APA (7th ed.) Citation

Tillman, F. A., Berofsky, B., & O'Connor, J. M. (1971). Introductory philosophy (2η έκδ.). Harper & Row.

Chicago Style (17th ed.) Citation

Tillman, Frank A., Bernard Berofsky, and John Morris O'Connor. Introductory Philosophy. 2η έκδ. New York: Harper & Row, 1971.

MLA (8th ed.) Citation

Tillman, Frank A., et al. Introductory Philosophy. 2η έκδ. Harper & Row, 1971.