Cita APA (7a ed.)

Whitlock, H. P. (1940). The story of the gems. A popular handbook. Garden City Publ.

Cita Chicago Style (17a ed.)

Whitlock, Herbert P. The Story of the Gems. A Popular Handbook. New York: Garden City Publ, 1940.

Cita MLA (9a ed.)

Whitlock, Herbert P. The Story of the Gems. A Popular Handbook. Garden City Publ, 1940.