APA (7th ed.) Citation

Davis, W. (1931). Science today: A layman's handbook of recent discoveries. Harcourt, Brace.

Chicago Style (17th ed.) Citation

Davis, Watson. Science Today: A Layman's Handbook of Recent Discoveries. New York: Harcourt, Brace, 1931.

MLA (9th ed.) Citation

Davis, Watson. Science Today: A Layman's Handbook of Recent Discoveries. Harcourt, Brace, 1931.