Velline, Velline, and Yessica Sardina Purba. 2022. “Determinant Analysis of Motivation and Work Discipline on Employee Achievement (Case Study at PT. Chayani Megajaya Mandiri)”. Jurnal Mantik 5 (4):2224-30. https://www.iocscience.org/ejournal/index.php/mantik/article/view/1964.