Cita APA (7th ed.)

Sears, S. W. (1973). The horizon history of the british empire. American Heritage Pub. Co..

Cita Chicago (17th ed.)

Sears, Stephen W. The Horizon History of the British Empire. New York: American Heritage Pub. Co., 1973.

Cita MLA (9th ed.)

Sears, Stephen W. The Horizon History of the British Empire. American Heritage Pub. Co., 1973.