APA استشهاد

Tul,Donald S, & Hawkins,Del I. Marketing research: Measurement and method (2nd ed.). Collier Macmillan International.

استشهاد بنمط شيكاغو

Tul,Donald S, و Hawkins,Del I. Marketing Research: Measurement and Method. 2nd ed. New York: Collier Macmillan International.

MLA استشهاد

Tul,Donald S, و Hawkins,Del I. Marketing Research: Measurement and Method. 2nd ed. Collier Macmillan International.