Cita APA

Trewartha, G. T. (1967). Physical elements of geography (5a. ed.). New York: McGraw-Hill.

Citación estilo Chicago

Trewartha, Glenn T. Physical Elements of Geography. 5a. ed. New York: McGraw-Hill, 1967.

Cita MLA

Trewartha, Glenn T. Physical Elements of Geography. 5a. ed. New York: McGraw-Hill, 1967.