Budiarso, E. P., & Widagdo, S. (2020). The Effect Of The Implementation Of Standard Operating Procedure, Reward System, Training And The Work Environment On Work Productivity In PT. BPR WILIS Jember. ABM: International Journal of Administration, Business and Management, 2(1), 69-76. https://doi.org/10.31967/abm.v2i1.391