Cita APA (7th ed.)
William H. Cunningham & Perreault, W. D. (1987). Marketing: A managerial approach (9th ed.). Irwin.
Cita Chicago (17th ed.)
William H. Cunningham i William D. Perreault. Marketing: A Managerial Approach. 9th ed. Homewood, Ill.: Irwin, 1987.
Cita MLA (9th ed.)
William H. Cunningham i William D. Perreault. Marketing: A Managerial Approach. 9th ed. Irwin, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.