APA (7th ed.) Citation

Downs, R. B. (1970). Books that Changed America. Collier-Macmillan.

Chicago Style (17th ed.) Citation

Downs, Robert B. Books That Changed America. London: Collier-Macmillan, 1970.

MLA (9th ed.) Citation

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