Satria Wicaksono, Noah Jonathan, and J.E Sutanto. “THE IMPACT OF PRODUCT VARIATION, PRODUCT QUALITY, AND SERVICE QUALITY ON PURCHASE DECISION OF KO-KOPIAN PRODUCTS”. International Journal of Economics, Business and Accounting Research (IJEBAR) 6, no. 1 (March 31, 2022): 570–577. Accessed July 12, 2025. https://jurnal.stie-aas.ac.id/index.php/IJEBAR/article/view/4860.