“STRATEGI PEMASARAN ULTRA MILK MELALUI: CITRA MEREK, GREEN MARKETING, DAN KOLABORASI SELEBRITI”. Professional Bussiness Journal 2, no. 1 (July 7, 2025): 35–46. Accessed June 4, 2026. https://jurnal.usp.ac.id/index.php/professional-bussiness-journal/article/view/214.