APA (7th ed.) Citation

Olen, J. (1983). Persons and their world: An introduction to philosophy. Random House.

Chicago Style (17th ed.) Citation

Olen, Jeffrey. Persons and Their World: An Introduction to Philosophy. New York: Random House, 1983.

MLA (9th ed.) Citation

Olen, Jeffrey. Persons and Their World: An Introduction to Philosophy. Random House, 1983.