Ridwan Yusuf, M. R. “PENERAPAN METODE CUSTOMER RELATIONSHIP MANAGEMENT PADA E- COMMERCE BERBASIS ANDROID (STUDI KASUS : PT KIMIA FARMA)”. Jurnal Multimedia Dan Android (JMA), Vol. 1, no. 1, Mar. 2020, https://ojs.umitra.ac.id/index.php/JMA/article/view/2058.