کتاب های William G. Zikmund
Business Research Methods, 8th Edition
William G. Zikmund, 2009
Essentials of Marketing Research , Fourth Edition
William G. Zikmund, 2009
Investigación de mercados
William G. Zikmund, 2009
Exploring marketing research
William G. Zikmund; Barry J. Babin, 2016
