Luck, D. J., & Rubin, R. S. (1987). Marketing research (7th ed.). Prentice-Hall / pvt. Ltd..
Cita Chicago (17th ed.)Luck, David Johnston, i Ronald S. Rubin. Marketing Research. 7th ed. Englewood Cliffs, NJ ; New Delhi: Prentice-Hall / pvt. Ltd., 1987.
Cita MLA (8th ed.)Luck, David Johnston, i Ronald S. Rubin. Marketing Research. 7th ed. Prentice-Hall / pvt. Ltd., 1987.
Atenció: Aquestes cites poden no estar 100% correctes.