Cita APA (7a ed.)

Dunbar, G. S. (1991). Modern geography: An encyclopedic survey. Garland.

Cita Chicago Style (17a ed.)

Dunbar, Gary S. Modern Geography: An Encyclopedic Survey. New York: Garland, 1991.

Cita MLA (9a ed.)

Dunbar, Gary S. Modern Geography: An Encyclopedic Survey. Garland, 1991.