Cindy Sibarani, Hotner Tampubolon, Ganda Hutapea. The Effect of Learning Motivation and Learning Environment on Student Achievement Index (Case Study of FEB UKI Class of 2018-2019). Fundamental; Management; [Internet]. 2023 Apr. 19 [cited 2026 Apr. 24];8(1):90-109. Available from: https://ejournal.uki.ac.id/index.php/jm/article/view/4795