Simatupang, Monika, and Lamhot Henry Pasaribu. “The Impact of Price, Service Quality, and Store Atmosphere on Customer Loyalty: A Starbucks Reserve Study”. Commercium : Journal of Business and Management 3, no. 2 (April 11, 2025): 77–100. Accessed November 7, 2025. https://journal.idscipub.com/index.php/commercium/article/view/510.