Cita APA (7a ed.)

Sanger, M. (1950). The pivot of civilization. Pergamon Press.

Cita Chicago Style (17a ed.)

Sanger, Margaret. The Pivot of Civilization. Oxford: Pergamon Press, 1950.

Cita MLA (8a ed.)

Sanger, Margaret. The Pivot of Civilization. Pergamon Press, 1950.