Style de citation APA (7e éd.)

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

Style de citation Chicago (17e éd.)

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

Style de citation MLA (8e éd.)

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