Sroithong, N., and S. Tantasanee. “Exploring Employee Effectiveness Using ‘The 7 Habits of Highly Effective People’ As a Framework: A Case Study of PRG Group”. ABAC ODI JOURNAL Vision. Action. Outcome, vol. 6, no. 2, July 2019, pp. 152-70, http://www.assumptionjournal.au.edu/index.php/odijournal/article/view/3836.