Cita APA

Semple, E. C. 1., & Fielden Jones, C. (1960). American history and its geographic conditions. New York: Russell & Russell.

Citación estilo Chicago

Semple, Ellen Churchill 1863-1932, y Clarence Fielden Jones. American History and Its Geographic Conditions. New York: Russell & Russell, 1960.

Cita MLA

Semple, Ellen Churchill 1863-1932, y Clarence Fielden Jones. American History and Its Geographic Conditions. New York: Russell & Russell, 1960.