CHISHOLM, R. M. (1977). Theory of knowledge.--ed.2. Prentice-Hall of India.
Lua i Stíl Chicago (17ú heag.)CHISHOLM, Roderick M. Theory of Knowledge.--ed.2. New Delhi: Prentice-Hall of India, 1977.
Lua MLA (9ú heag.)CHISHOLM, Roderick M. Theory of Knowledge.--ed.2. Prentice-Hall of India, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.