APA (7th ed.) Citation

Skemp, R. R. (1993). The psychology of learning mathematics (2nd edition.). Penguin Books.

Chicago Style (17th ed.) Citation

Skemp, Richard R. The Psychology of Learning Mathematics. 2nd edition. New York: Penguin Books, 1993.

MLA (8th ed.) Citation

Skemp, Richard R. The Psychology of Learning Mathematics. 2nd edition. Penguin Books, 1993.

Warning: These citations may not always be 100% accurate.