แหลมคม ชนิตา, and ณ ป้อมเพ็ชร์ กุลกัญญา. “MARKETING MIX FACTORS IN USING TAXI SERVICE FOR GRAB APPLICATIONS OF THE PASSENGER IN THE CENTRAL REGION”. Journal of KMITL Business school 8, no. 2 (December 28, 2018): 151–174. Accessed May 3, 2024. https://so02.tci-thaijo.org/index.php/fam/article/view/207124.