APA (7th ed.) Zitazioa

Woodruff, W. (1981). The struggle for world power 1500-1980. Macmillan.

Chicago Style (17th ed.) Zitazioa

Woodruff, William. The Struggle for World Power 1500-1980. London: Macmillan, 1981.

MLA (9th ed.) Zitazioa

Woodruff, William. The Struggle for World Power 1500-1980. Macmillan, 1981.