APA (7th ed.) Zitazioa

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

Chicago Style (17th ed.) Zitazioa

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

MLA (9th ed.) Zitazioa

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