APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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