APA (7th ed.) Zitazioa

ebrary, Inc, Brown, J. M., Louis, W. R., & Low, A. M. (1999). The twentieth century. Oxford University Press.

Chicago Style (17th ed.) Zitazioa

ebrary, Inc, Judith M. Brown, William Roger Louis, eta Alaine M. Low. The Twentieth Century. Oxford: Oxford University Press, 1999.

MLA (9th ed.) Zitazioa

ebrary, Inc, et al. The Twentieth Century. Oxford University Press, 1999.