Cita APA (7th ed.)

Jaspers, K., & Bullock, M. (1953). The origin and goal of history. Yale University Press.

Cita Chicago (17th ed.)

Jaspers, Karl, i Michael Bullock. The Origin and Goal of History. New Haven: Yale University Press, 1953.

Cita MLA (9th ed.)

Jaspers, Karl, i Michael Bullock. The Origin and Goal of History. Yale University Press, 1953.