Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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