APA (7th ed.) Citation

Rugg, H., & Krueger, L. (1938). Mankind throughout the ages. Ginn and Company.

Chicago Style (17th ed.) Citation

Rugg, Harold, and Louise Krueger. Mankind Throughout the Ages. Boston: Ginn and Company, 1938.

MLA (9th ed.) Citation

Rugg, Harold, and Louise Krueger. Mankind Throughout the Ages. Ginn and Company, 1938.