Diyanti, Ela Wahyu, and Ika Korika Swasti. “The Effect of Technical Competence and Certification Training on Employee Performance at PT. Petrokopindo Cipta Selaras”. Indonesian Journal of Business Analytics 3, no. 5 (October 19, 2023): 1803–1814. Accessed September 19, 2024. https://journal.formosapublisher.org/index.php/ijba/article/view/5603.