THE EFFECT OF PRICE, PRODUCT QUALITY, SERVICE QUALITY, AND PROMOTION ON CUSTOMER LOYALTY OF SNOWHITE SKINCARE GRAND DEVINA BEAUTY CLINIC MALANG REGENCY. KISA INSTITUTE. 2024;1(9):14-23. Accessed November 12, 2025. https://kisainstitute.com/index.php/kisainstitute/article/view/37