APA (7th ed.) Citation

Downs, R. B. (1970). Books that changed America. Macmillan.

Chicago Style (17th ed.) Citation

Downs, Robert B. Books That Changed America. [New York]: Macmillan, 1970.

MLA (8th ed.) Citation

Downs, Robert B. Books That Changed America. Macmillan, 1970.

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