Immanuel Edy Suranta Sebayang 2024. Analysis of the Promotion Mix Strategy on the Number of Martabe Savings Customers at PT Bank Sumut, Tembung Branch Office. Jurnal Indonesia : Manajemen Informatika dan Komunikasi. 5, 3 (Jun. 2024), 2216-2227. DOI:https://doi.org/10.35870/jimik.v5i3.866.