Vallery, Vallery, Happy Novita, and Sufika Sary. “Effect Of Price, Service Quality And Promotion On Customer Satisfaction (GRAB): Effect Of Price, Service Quality And Promotion On Customer Satisfaction (GRAB)”. Jurnal Mantik 3, no. 4 (February 1, 2020): 733-742. Accessed June 13, 2026. https://www.iocscience.org/ejournal/index.php/mantik/article/view/709.