Agusty RM, Widagdo H. The Influence of Product Quality and Promotion on Purchasing Decisions of Janji Jiwa Palembang Coffee. JMS [Internet]. 2025 Mar. 20 [cited 2026 Jun. 12];5(03):299-305. Available from: https://ejournal.seaninstitute.or.id/index.php/JMS/article/view/6402