APA (7th ed.) Citation

Zipf, G. K. (1936). The psycho-biology of language: An introduction to dynamic philology. Routledge.

Chicago Style (17th ed.) Citation

Zipf, George Kingsley. The Psycho-biology of Language: An Introduction to Dynamic Philology. Lond.: Routledge, 1936.

MLA (8th ed.) Citation

Zipf, George Kingsley. The Psycho-biology of Language: An Introduction to Dynamic Philology. Routledge, 1936.

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