Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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