BOWIE, G. (1992). Twenty questions: An introduction to philosophy. Harcourt Brace Jovanovich College Publishers.
Cita Chicago (17th ed.)BOWIE, G. Twenty Questions: An Introduction to Philosophy. Harcourt Brace Jovanovich College Publishers, 1992.
Cita MLA (9th ed.)BOWIE, G. Twenty Questions: An Introduction to Philosophy. Harcourt Brace Jovanovich College Publishers, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.