Cita APA (7th ed.)

Tull, D. S., & Hawkins, D. I. (1993). Marketing research: Measurement & method (6th ed.). Macmillan.

Cita Chicago (17th ed.)

Tull, Donald S., i Del I. Hawkins. Marketing Research: Measurement & Method. 6th ed. New York: Macmillan, 1993.

Cita MLA (9th ed.)

Tull, Donald S., i Del I. Hawkins. Marketing Research: Measurement & Method. 6th ed. Macmillan, 1993.