Cita APA (7th ed.)

Boehm, R. G., & Swanson, J. L. (1989). World geography: California G128 .B. Glencoe Publishing.

Cita Chicago (17th ed.)

Boehm, Richard G., i James L. Swanson. World Geography: California G128 .B. New York: Glencoe Publishing, 1989.

Cita MLA (9th ed.)

Boehm, Richard G., i James L. Swanson. World Geography: California G128 .B. Glencoe Publishing, 1989.