Nugraha RN, Riyadi FA. Marketing Mix in an Effort to Maintain The Product GONG CHA on The Existence of International Sale of Beverage Products. WSIS [Internet]. 2024 Feb. 23 [cited 2024 Nov. 23];2(02):279-93. Available from: https://wsj.westscience-press.com/index.php/wsis/article/view/598