Rehman, Asad, and Syed Ahsan Jamil. “Influence of Income and Occupation on Consumers’ Susceptibility to Reference Group Demands on Brand Choice Decisions”. International Review of Management and Marketing, vol. 6, no. 2, Apr. 2016, pp. 376-82, https://econjournals.com/index.php/irmm/article/view/1970.