Immanuel Edy Suranta Sebayang. Analysis of the Promotion Mix Strategy on the Number of Martabe Savings Customers at PT Bank Sumut, Tembung Branch Office. jimik [Internet]. 2024Jun.20 [cited 2026Jun.24];5(3):2216-27. Available from: http://journal.stmiki.ac.id/index.php/jimik/article/view/866