Ispurwanto, W. .; Murti, T. R. .; Yunanto, K. T. .; Abraham, J. .; Nainggolan, T. .; Nugroho, R. . A Performance Model of the Indonesian National Police: The Role of Communication Apprehension, Servant Leadership, Group Cohesiveness, and Silence Behavior. 73 2021, 9, 326-340.