APA (7th ed.) Citation

McCollum, E. V., Day Harry Gilbert, & Keiles, E. (1939). The newer knowledge of nutrition (5th ed., entirely rewritten.). Macmillan.

Chicago Style (17th ed.) Citation

McCollum, Elmer Verner, Day Harry Gilbert, and Elsa Keiles. The Newer Knowledge of Nutrition. 5th ed., entirely rewritten. New York: Macmillan, 1939.

MLA (9th ed.) Citation

McCollum, Elmer Verner, et al. The Newer Knowledge of Nutrition. 5th ed., entirely rewritten. Macmillan, 1939.