APA (7th ed.) Citation

Downs, R. B. (1978). Books that changed the world (2nd ed.). American Library Association.

Chicago Style (17th ed.) Citation

Downs, Robert Bingham. Books That Changed the World. 2nd ed. Chicago: American Library Association, 1978.

MLA (8th ed.) Citation

Downs, Robert Bingham. Books That Changed the World. 2nd ed. American Library Association, 1978.