APA (7th ed.) Citation

Riopelle, A. J. (1967). Animal problem solving: Selected readings. Penguin Books.

Chicago Style (17th ed.) Citation

Riopelle, A. J. Animal Problem Solving: Selected Readings. [Baltimore] ; Harmondsworth: Penguin Books, 1967.

MLA (8th ed.) Citation

Riopelle, A. J. Animal Problem Solving: Selected Readings. Penguin Books, 1967.

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