BOWIE, G. (1992). Twenty questions: An introduction to philosophy. Harcourt Brace Jovanovich College Publishers.
Chicago-viite (17. p.)BOWIE, G. Twenty Questions: An Introduction to Philosophy. Harcourt Brace Jovanovich College Publishers, 1992.
MLA-viite (9. p.)BOWIE, G. Twenty Questions: An Introduction to Philosophy. Harcourt Brace Jovanovich College Publishers, 1992.
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