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