Nichora, Marcellino Paskah, and Mery Citra Sondari. “Pengaruh Penerapan Gamifikasi Terhadap Loyalitas Pengguna Grab”. Journal of Digital Business Innovation, vol. 1, no. 1, May 2024, pp. 74-87, https://jibd.uds.ac.id/digbi/article/view/10.