Sari, Ayu Puspita, and Eti Arini. 2021. “The Effect of Service Quality, Product Quality, and Price on Customer Loyalty (Case Study on Robusta Coffee Customers Kec. Kepahiang Kab. Kepahiang)”. Journal of Indonesian Management 1 (4):402-10. https://doi.org/10.53697/jim.v1i4.285.