Wahyono, Peri, and Siti Nur Azizah. “The Effect of Servant Leadership and Non-Physical Work Environment on Employee Performance With Motivation As Mediation at the Nusakambangan Open Correctional Institution ”. Jurnal Mantik 9, no. 4 (February 28, 2026): 1245-1253. Accessed May 31, 2026. http://www.ejournal.iocscience.org/index.php/mantik/article/view/6979.