Cita APA (7th ed.)

Gastil, R. D. (1975). Cultural regions of the United States. University of Washington Press.

Cita Chicago (17th ed.)

Gastil, Raymond D. Cultural Regions of the United States. Seattle: University of Washington Press, 1975.

Cita MLA (8th ed.)

Gastil, Raymond D. Cultural Regions of the United States. University of Washington Press, 1975.