Rahman, Arif, Agus Suhaila, and R.Ati Haryati. “Implementation of Service Quality Improvement Strategies in Service Unit Division PT. Pos Indonesia (Persero) Jakarta”. Journal of Industrial Engineering & Management Research 2, no. 4 (July 12, 2021): 138 - 153. Accessed November 19, 2024. https://jiemar.org/index.php/jiemar/article/view/172.