Wolters Marbun, Dick, dan Bill Schara Marbun. “THE INFLUENCE OF PRODUCTION COSTS ON NET PROFIT (Case Study on Automotive and Component Sub-Sector Manufacturing Companies Listed on the Indonesia Stock Exchange 2016-2019)”. Jurnal Terapan Ilmu Manajemen dan Bisnis 4, no. 2 (Oktober 18, 2021): 110-128. Diakses April 27, 2024. https://jurnal.unai.edu/index.php/jtimb/article/view/2629.