Cita APA (7th ed.)

Langer, W. L. (1958). An encyclopedia of world history. Riverside Press.

Cita Chicago (17th ed.)

Langer, William L. An Encyclopedia of World History. Cambridge: Riverside Press, 1958.

Cita MLA (9th ed.)

Langer, William L. An Encyclopedia of World History. Riverside Press, 1958.