Cita APA (7a ed.)

Frederick, J. G. (1929). Selling by telephone. Business Bourse Publishers.

Cita Chicago Style (17a ed.)

Frederick, J. George. Selling by Telephone. New York: Business Bourse Publishers, 1929.

Cita MLA (8a ed.)

Frederick, J. George. Selling by Telephone. Business Bourse Publishers, 1929.