Cita APA (7a ed.)

Trewartha, . G. T., Robinson, A. H., & Hammond, E. H. (1967). Elements of Geography (5th ed.). McGraw-Hill.

Cita Chicago Style (17a ed.)

Trewartha, Glenn T., Arthur H. Robinson, y Edwin H. Hammond. Elements of Geography. 5th ed. New York: McGraw-Hill, 1967.

Cita MLA (9a ed.)

Trewartha, Glenn T., et al. Elements of Geography. 5th ed. McGraw-Hill, 1967.