Bowie, G. L., Michaels, M. W., & Solomon, R. C. (1996). Twenty questions: An introduction to philosophy (3rd ed.). Harcourt Brace College Publishers.
Citace podle Chicago (17th ed.)Bowie, G. Lee, Meredith W. Michaels, a Robert C. Solomon. Twenty Questions: An Introduction to Philosophy. 3rd ed. Fort Worth: Harcourt Brace College Publishers, 1996.
Citace podle MLA (9th ed.)Bowie, G. Lee, et al. Twenty Questions: An Introduction to Philosophy. 3rd ed. Harcourt Brace College Publishers, 1996.
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