Novi Wahyuningsih, and Ardi Harto Mulyo. “PERCEPTION ON WHATSAPP AND CALLIND”. Universal Scholars Journal of Business and Management Research 2, no. 06 (June 23, 2025): 12–21. Accessed July 25, 2026. https://universalscholars.org/index.php/JBMR/article/view/98.