Cita APA (7th ed.)
Berkowitz, E. N. (1997). Marketing (5th ed.). Irwin.
Cita Chicago (17th ed.)
Berkowitz, Eric N. Marketing. 5th ed. Chicago, Ill.: Irwin, 1997.
Cita MLA (9th ed.)
Berkowitz, Eric N. Marketing. 5th ed. Irwin, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.