APA (7th ed.) Citation

Pfungst, O., & Rahn, C. L. (2010). Clever Hans (The horse of Mr. Von Osten): A contribution to experimental animal and human psychology. Project Gutenberg.

Chicago Style (17th ed.) Citation

Pfungst, Oskar, and Carl L. Rahn. Clever Hans (The Horse of Mr. Von Osten): A Contribution to Experimental Animal and Human Psychology. Project Gutenberg, 2010.

MLA (9th ed.) Citation

Pfungst, Oskar, and Carl L. Rahn. Clever Hans (The Horse of Mr. Von Osten): A Contribution to Experimental Animal and Human Psychology. Project Gutenberg, 2010.

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