Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.