Khorasani, Sasan Torabzadeh, and Maryam Almasifard. “Evolution of Management Theory Within 20 Century: A Systemic Overview of Paradigm Shifts in Management”. International Review of Management and Marketing, vol. 7, no. 3, July 2017, pp. 134-7, https://econjournals.com/index.php/irmm/article/view/4719.