Cita APA (7th ed.)

Bowie, G. L., Michaels, M. W., & Solomon, R. C. (2000). Twenty questions: An introduction to philosophy (4th ed.). Harcourt College Publishers.

Cita Chicago (17th ed.)

Bowie, G. Lee, Meredith W. Michaels, i Robert C. Solomon. Twenty Questions: An Introduction to Philosophy. 4th ed. Fort Worth, TX: Harcourt College Publishers, 2000.

Cita MLA (9th ed.)

Bowie, G. Lee, et al. Twenty Questions: An Introduction to Philosophy. 4th ed. Harcourt College Publishers, 2000.