APA (7th ed.) Citation

Humphrey, G. (1951). Thinking: An introduction to its experimental psychology. Methuen [u.a.].

Chicago Style (17th ed.) Citation

Humphrey, George. Thinking: An Introduction to Its Experimental Psychology. London [u.a.]: Methuen [u.a.], 1951.

MLA (9th ed.) Citation

Humphrey, George. Thinking: An Introduction to Its Experimental Psychology. Methuen [u.a.], 1951.