APA (7th ed.) Citation

Rugg, H. O., & Krueger, L. (1936). Peoples and Countries. Ginn.

Chicago Style (17th ed.) Citation

Rugg, Harold Ordway, and Louise Krueger. Peoples and Countries. Boston [u.a.]: Ginn, 1936.

MLA (9th ed.) Citation

Rugg, Harold Ordway, and Louise Krueger. Peoples and Countries. Ginn, 1936.