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

Chicago Edition Citation

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

Cita MLA

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