Cita APA (7a ed.)

Callahan, D. (1971). The American population debate. Doubleday.

Cita Chicago Style (17a ed.)

Callahan, Daniel. The American Population Debate. Garden City, New York: Doubleday, 1971.

Cita MLA (9a ed.)

Callahan, Daniel. The American Population Debate. Doubleday, 1971.