อำนวยผล ปุณยนุช. “EMPLOYEE ENGAGEMENT OF AN OUTSOURCING COMPANY IN BANGKOK NOI DISTRICT, BANGKOK”. Pathumthani University Academic Journal 12, no. 2 (December 31, 2020): 277–288. Accessed March 28, 2024. https://so05.tci-thaijo.org/index.php/ptujournal/article/view/246894.