Igor Dessaint และ Pakakorn Rakrachakarn. (2017) Cosi’s hotels new marketing strategy dedicated to millennials generation. Stamford International University:ม.ป.ท.Igor Dessaint และ Pakakorn Rakrachakarn. 2017. Cosi’s hotels new marketing strategy dedicated to millennials generation. ม.ป.ท.:Stamford International University;Igor Dessaint และ Pakakorn Rakrachakarn. Cosi’s hotels new marketing strategy dedicated to millennials generation. ม.ป.ท.:Stamford International University, 2017. Print.