Dennis Rydarto Tambunan, Heru Kreshna Reza, Melly Susanti, and Sabri. “Customer Relationship Management In Banking Sector Case Study Of Conventional Banks”. International Journal of Science, Technology & Management, Vol. 2, no. 6, Nov. 2021, pp. 2136-42, doi:10.46729/ijstm.v2i6.364.