Ullah, S., S. Lei, S. Ali, and S. Odilova. “Influence of Type of Product on Brand and Cause Images in a Cause-Related Marketing Campaign: Evidence from Pakistan”. Journal of Research in Business, Economics and Management, Vol. 10, no. 5, May 2018, pp. 2062-7, http://scitecresearch.com/journals/index.php/jrbem/article/view/1486.