Ayob, Abu H, and Wan Mohd Hirwani Wan Hussain. “Buying Local or Imported Goods? Profiling Non-Income Consumers in Developing Countries”. International Review of Management and Marketing, vol. 6, no. 4, Oct. 2016, pp. 688-95, https://mail.econjournals.com/index.php/irmm/article/view/2751.