Sondakh, Putra C., Tinneke M. Tumbel, and Olivia F. C Walangitan. “Pengaruh Harga Dan Promosi Terhadap Keputusan Pembelian Kopi Kapal Api Di Manado”. Productivity 4, no. 3 (May 17, 2023): 437–443. Accessed June 30, 2024. https://ejournal.unsrat.ac.id/v3/index.php/productivity/article/view/48167.