Istanti, Enny. 2021. “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 (3):2952-61. https://doi.org/10.29040/ijebar.v5i3.3285.