1. Poznań University of Economics and Business , Department of Marketing Strategies , Al. Niepodległości 10 , Poznań , Poland
2. Poznań University of Economics and Business , Department of Market Research and Services , Al. Niepodległości 10 , Poznań , Poland
3. Poznań University of Economics and Business , Department of Product Marketing , Al. Niepodległości 10 , Poznań , Poland