APA (7th ed.) Zitazioa

Com & edited by Langer, W. L. (1972). An encyclopedia of world history: Ancient, medieval, and modern Chrnologically arranged. Houghton Mifflin.

Chicago Style (17th ed.) Zitazioa

Com & edited by Langer, William L. An Encyclopedia of World History: Ancient, Medieval, and Modern Chrnologically Arranged. Boston: Houghton Mifflin, 1972.

MLA (9th ed.) Zitazioa

Com & edited by Langer, William L. An Encyclopedia of World History: Ancient, Medieval, and Modern Chrnologically Arranged. Houghton Mifflin, 1972.