Feinberg, Fred M Modern marketing research: Concepts, methods and cases - 2nd ed. - New York Cengage Learning 2013 - xxix, 689 p. 2202 10/12/2015 PBA15/602 15/12/2015 IMSAR (Dev. & Research) ISBN: USD60 Dewey Class. No.: 658.83 F318M(2)