HUTCHINS, R. M. [. (1963). Gateway to the great books vol.10: Philosophical essays. Encyclopaedia Britannica.
Lua i Stíl Chicago (17ú heag.)HUTCHINS, Robert M. [Ed.]. Gateway to the Great Books Vol.10: Philosophical Essays. Chicago: Encyclopaedia Britannica, 1963.
Lua MLA (9ú heag.)HUTCHINS, Robert M. [Ed.]. Gateway to the Great Books Vol.10: Philosophical Essays. Encyclopaedia Britannica, 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.