Sibagariang, F. M., M. . Audia, Y. K. A. . Sitorus, V. A. . Tiara, and Y. Ernanda. “The Influence of Motivation, Leadership, and Productivity on Employee Performance at Belawan Container Terminal”. International Journal of Comparative Accounting And Management Science (IJCAMS), vol. 1, no. 2, June 2022, pp. 29-37, https://ijcams.sbm.or.id/index.php/ams/article/view/4.