Swarant, Dennis, and Kristi Endah Ndilosa Ginting. “Effect of Job Stress, Job Competence and Job Training on Employee Performance at PT Indostar Sukses Mandiri Medan”. Jurnal Mantik 4, no. 4 (February 1, 2021): 2558-2562. Accessed April 23, 2026. https://www.iocscience.org/ejournal/index.php/mantik/article/view/1208.