BOWIE, G. (1992). Twenty questions: An introduction to philosophy. Harcourt Brace Jovanovich College Publishers.
Lua i Stíl Chicago (17ú heag.)BOWIE, G. Twenty Questions: An Introduction to Philosophy. Harcourt Brace Jovanovich College Publishers, 1992.
Lua MLA (9ú heag.)BOWIE, G. Twenty Questions: An Introduction to Philosophy. Harcourt Brace Jovanovich College Publishers, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.