APA (7th ed.) Citation

Rugg, H. O. (1938). Changing countries and changing peoples: An introduction to world geography with historical backgrounds. [s.n.

Chicago Style (17th ed.) Citation

Rugg, Harold Ordway. Changing Countries and Changing Peoples: An Introduction to World Geography with Historical Backgrounds. Boston, Ginn: [s.n, 1938.

MLA (9th ed.) Citation

Rugg, Harold Ordway. Changing Countries and Changing Peoples: An Introduction to World Geography with Historical Backgrounds. [s.n, 1938.