Cita APA (7a ed.)

Knupffer, G. (1963). The struggle for world power (2nd, revised, edition.). The Plain-Speaker Publishing Company.

Cita Chicago Style (17a ed.)

Knupffer, George. The Struggle for World Power. 2nd, revised, edition. London: The Plain-Speaker Publishing Company, 1963.

Cita MLA (9a ed.)

Knupffer, George. The Struggle for World Power. 2nd, revised, edition. The Plain-Speaker Publishing Company, 1963.