Cita APA (7th ed.)

WHEELER, J. H., Jr, & KOSTBADE, J. T. Regional geography of the world: An introductory survey. Holt.

Cita Chicago (17th ed.)

WHEELER, Josse H., Jr, i J. Trenton KOSTBADE. Regional Geography of the World: An Introductory Survey. New York: Holt.

Cita MLA (9th ed.)

WHEELER, Josse H., Jr, i J. Trenton KOSTBADE. Regional Geography of the World: An Introductory Survey. Holt.