APA (7th ed.) Citation

Guthrie, E. R. (1952). The psychology of learning (Revised edition.). Peter Smith.

Chicago Style (17th ed.) Citation

Guthrie, Edwin R. The Psychology of Learning. Revised edition. Gloucester, Mass.: Peter Smith, 1952.

MLA (9th ed.) Citation

Guthrie, Edwin R. The Psychology of Learning. Revised edition. Peter Smith, 1952.