Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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