Cita APA (7th ed.)

Cohen, W. A. (1998). The marketing plan (2nd ed.). Wiley.

Cita Chicago (17th ed.)

Cohen, William A. The Marketing Plan. 2nd ed. New York: Wiley, 1998.

Cita MLA (9th ed.)

Cohen, William A. The Marketing Plan. 2nd ed. Wiley, 1998.