Kaewwongwattana, Peerakan, Vinai Panjakajornsak, and Paitoon Pimdee. 2016. “Bangkok’s Mass Rapid Transit system’s Commuter Decision-Making Process in Using Integrated Smartcards”. Kasetsart Journal of Social Sciences 37 (2):112-18. https://so04.tci-thaijo.org/index.php/kjss/article/view/242848.