Nugraha, Rizki Nurul, and Fauzi Achmad Riyadi , trans. “Marketing Mix in an Effort to Maintain The Product GONG CHA on The Existence of International Sale of Beverage Products”. West Science Interdisciplinary Studies 2, no. 02 (February 23, 2024): 279–293. Accessed December 6, 2025. https://wsj.westsciences.com/index.php/wsis/article/view/598.