APA (7. basım) Alıntı

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

Chicago Style (17. basım) Atıf

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

MLA (9th ed.) Atıf

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