Lesmana A, Widiawati S. Analisis Harga Pokok Penjualan dan Biaya Produksi terhadap Laba Kotor . jrak [Internet]. 2020Jul.30 [cited 2025May2];6(2):134-45. Available from: https://jurnal.plb.ac.id/index.php/JRAK/article/view/428