APA (7th ed.) Zitazioa

Patterson, J. T. (1976). America in the twentieth century. Harcourt.

Chicago Style (17th ed.) Zitazioa

Patterson, James T. America in the Twentieth Century. New York: Harcourt, 1976.

MLA (9th ed.) Zitazioa

Patterson, James T. America in the Twentieth Century. Harcourt, 1976.