Utama, Vira Melinia. “Effect of Promotion, Perceive of Usefulness and Security of Use in Interest Digital Wallet OVO”. Journal of Fundamental Management (JFM) 3, no. 1 (June 1, 2023): 16–30. Accessed June 3, 2026. https://publikasi.mercubuana.ac.id/index.php/jfm/article/view/17886.