Παραπομπή APA

Tull,Donald S, & Hawkins,Del I. (1993). Marketing research: Measurement & method (6th ed.). Prentice-Hall of India Pvt. Ltd.

Παραπομπή Chicago Style

Tull,Donald S, και Hawkins,Del I. Marketing Research: Measurement & Method. 6th ed. New Delhi: Prentice-Hall of India Pvt. Ltd, 1993.

Παραπομπή MLA

Tull,Donald S, και Hawkins,Del I. Marketing Research: Measurement & Method. 6th ed. Prentice-Hall of India Pvt. Ltd, 1993.