Sembiring, Ruwina Puspita, and Rahmat Hidayat. “ANALYSIS OF MARKETING STRATEGIES IN MAINTAINING PRODUCT LIFE CYCLE AT PT. SIANTAR TOP,TBK”. Jurnal Ekonomi 12, no. 3 (September 30, 2023): 767–771. Accessed July 9, 2025. https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/2120.