Luck, D. J., & Rubin, R. S. (1987). Marketing research (7th ed.). Prentice-Hall of India.
Cita Chicago (17th ed.)Luck, David J., i Ronald S. Rubin. Marketing Research. 7th ed. New Delhi: Prentice-Hall of India, 1987.
Cita MLA (9th ed.)Luck, David J., i Ronald S. Rubin. Marketing Research. 7th ed. Prentice-Hall of India, 1987.
Atenció: Aquestes cites poden no estar 100% correctes.