Gaya APA

Zipf, G, K. (1935). The Psycho-Biology of Language: an introduction to Dynamic Philology . Boston: Houghton Mifflin Company.

Gaya MLA

Zipf, George, Kingsley. "The Psycho-Biology of Language: an introduction to Dynamic Philology". Boston: Houghton Mifflin Company, 1935. .