APA (7th ed.) Citation

Downs, R. B. (1956). Books that changed the world. American Library Association.

Chicago Style (17th ed.) Citation

Downs, Robert Bingham. Books That Changed the World. Chicago: American Library Association, 1956.

MLA (9th ed.) Citation

Downs, Robert Bingham. Books That Changed the World. American Library Association, 1956.

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