Cita APA (7th ed.)

Kampen, N., & Kaufmann, W. (1978). What is man? Reader's Digest Press ; distributed by McGraw-Hill, Inc.

Cita Chicago (17th ed.)

Kampen, Natalie, i Walter Kaufmann. What Is Man? New York: Reader's Digest Press ; distributed by McGraw-Hill, Inc, 1978.

Cita MLA (9th ed.)

Kampen, Natalie, i Walter Kaufmann. What Is Man? Reader's Digest Press ; distributed by McGraw-Hill, Inc, 1978.