Istanti, Enny. “EFFECT OF E-COMMERCE, PUBLIC RELATIONS AND CUSTOMER RELATIONSHIP MANAGEMENT ON PURCHASE DECISIONS (CASE STUDY OF OPPO BRAND SMARTPHONE USERS IN WTC SURABAYA)”. International Journal of Economics, Business and Accounting Research (IJEBAR) 5, no. 3 (October 22, 2021): 2952–2961. Accessed August 17, 2025. https://jurnal.stie-aas.ac.id/index.php/IJEBAR/article/view/3285.