Cita APA (7th ed.)

Cohen, W. A. (2001). The marketing plan (3rd ed.). Wiley.

Cita Chicago (17th ed.)

Cohen, William A. The Marketing Plan. 3rd ed. New York: Wiley, 2001.

Cita MLA (9th ed.)

Cohen, William A. The Marketing Plan. 3rd ed. Wiley, 2001.