Cita APA (7a ed.)

Trewartha, G. T. (1969). A geography of population: World patterns. Wiley.

Cita Chicago Style (17a ed.)

Trewartha, Glenn Thomas. A Geography of Population: World Patterns. New York: Wiley, 1969.

Cita MLA (9a ed.)

Trewartha, Glenn Thomas. A Geography of Population: World Patterns. Wiley, 1969.