Depusoy, J L, C A Del Rosario, and J Mercado. “Evaluating the Effectiveness of Marketing Mix Used By Transport Network Vehicle Services”. KnE Social Sciences 3, no. 6 (June 4, 2018): 254–263. Accessed September 25, 2021. https://knepublishing.com/index.php/KnE-Social/article/view/2384.