Pride, W. M., & Ferrell, O. C. (1989). Marketing cases (4th ed.). Hougton Mifflin.
Cita Chicago (17th ed.)Pride, William M., i O. C. Ferrell. Marketing Cases. 4th ed. Dallas Geneva, Illinois: Hougton Mifflin, 1989.
Cita MLA (9th ed.)Pride, William M., i O. C. Ferrell. Marketing Cases. 4th ed. Hougton Mifflin, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.