Sembiring RP, Hidayat R. ANALYSIS OF MARKETING STRATEGIES IN MAINTAINING PRODUCT LIFE CYCLE AT PT. SIANTAR TOP,TBK. Jurnal Ekonomi [Internet]. 2023 Sep. 30 [cited 2024 Dec. 5];12(3):767-71. Available from: https://ejournal.seaninstitute.or.id/index.php/Ekonomi/article/view/2120