Effects of Product Quality and Promotion on Purchase Decision: A Case Study of The Lanang Suhang Soluble Coffee In Lahat Regency. int.jour.sci.res.mana [Internet]. 2021 Dec. 17 [cited 2024 Jul. 22];9(12):2765-7. Available from: https://ijsrm.net/index.php/ijsrm/article/view/3600