APA

Sears Stephen W, TimeLife Books, . (1973). The Horizon history of the British Empire. New York: American Heritage Pub. Co.; distributed by McGraw-Hill.

Chicago

Sears Stephen W, TimeLife Books, . 1973. The Horizon history of the British Empire. New York: American Heritage Pub. Co.; distributed by McGraw-Hill.

Harvard

Sears Stephen W, TimeLife Books, . (1973). The Horizon history of the British Empire. New York: American Heritage Pub. Co.; distributed by McGraw-Hill.

MLA

Sears Stephen W, TimeLife Books, . The Horizon history of the British Empire. New York: American Heritage Pub. Co.; distributed by McGraw-Hill. 1973.