Citazione Stile APA (7a Edizione)

Sinclair, W. A. (1945). An introduction to philosophy (Third Impression.). Oxford University Press.

Citazione stile Chigago Style (17a edizione)

Sinclair, William Angus. An Introduction to Philosophy. Third Impression. London ; New York ; Toronto: Oxford University Press, 1945.

Citatione MLA (9a ed.)

Sinclair, William Angus. An Introduction to Philosophy. Third Impression. Oxford University Press, 1945.