Warrad, L. H., and M. Nassar. “Could Profitability, Activity and Use of Equity Finance Increasing DuPont Model of Return on Equity? Jordanian Case”. International Review of Management and Marketing, vol. 7, no. 3, July 2017, pp. 35-41, https://econjournals.com/index.php/irmm/article/view/4375.