“Strategi Brand Extension dan Dampaknya terhadap Parent Brand Equity: Studi pada Varian Rasa Inovatif Ultra Milk” (2026) Professional Bussiness Journal, 3(2), pp. 87–98. Available at: https://jurnal.usp.ac.id/index.php/professional-bussiness-journal/article/view/245 (Accessed: 22 July 2026).