Tsani, Afrizal, Syahlan A Sume, and Ecin Kuraesin. “Harga Dan Promosi Terhadap Volume Penjualan”. Manager : Jurnal Ilmu Manajemen 2, no. 1 (March 1, 2019): 81–90. Accessed July 22, 2024. https://ejournal.uika-bogor.ac.id/index.php/Manager/article/view/1867.