Cita APA (7th ed.)
Lehmann, D. R. (1989). Market research and analysis (3rd ed.). Irwin.
Cita Chicago (17th ed.)
Lehmann, Donald R. Market Research and Analysis. 3rd ed. Homewood, IL.: Irwin, 1989.
Cita MLA (9th ed.)
Lehmann, Donald R. Market Research and Analysis. 3rd ed. Irwin, 1989.
Atenció: Aquestes cites poden no estar 100% correctes.