Cita APA (7a ed.)

Stwertka, E., & Stwertka, A. (1981). Population: Growth, change, and impact. F. Watts.

Cita Chicago Style (17a ed.)

Stwertka, Eve, y Albert Stwertka. Population: Growth, Change, and Impact. New York: F. Watts, 1981.

Cita MLA (9a ed.)

Stwertka, Eve, y Albert Stwertka. Population: Growth, Change, and Impact. F. Watts, 1981.