Tirtayasa, Satria. “The Effect Of Product Quality, Price, And Innovation On Marketing Performance Moderated Consumer Purchasing Power In UMKM Of Boba Drinks In Deli Serdang”. International Journal of Science, Technology & Management 3, no. 6 (November 14, 2022): 1731-1742. Accessed January 31, 2023. https://ijstm.inarah.co.id/index.php/ijstm/article/view/642.