Cita APA (7th ed.)
Tull, D. S., & Hawkins, D. I. (1993). Marketing research: Measurement & method (6th ed.). Maxwell Macmillan International.
Cita Chicago (17th ed.)
Tull, Donald S., i Del I. Hawkins. Marketing Research: Measurement & Method. 6th ed. New York: Maxwell Macmillan International, 1993.
Cita MLA (9th ed.)
Tull, Donald S., i Del I. Hawkins. Marketing Research: Measurement & Method. 6th ed. Maxwell Macmillan International, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.