Boonsap Witchayangkoon และ Sayan Sirimontree; Saharat Buddhawanna; Krittiya Lertpocasombut. (2015) Roles of Bangkok Vanpool Commuter Services Towards Livable City. <i>International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies</i>, <i>6</i>(1), 31-37.Boonsap Witchayangkoon และ Sayan Sirimontree; Saharat Buddhawanna; Krittiya Lertpocasombut. "Roles of Bangkok Vanpool Commuter Services Towards Livable City". International Transaction Journal of Engineering, Management, & Applied Sciences & Technologies 6 (2015):31-37.Boonsap Witchayangkoon และ Sayan Sirimontree; Saharat Buddhawanna; Krittiya Lertpocasombut. Roles of Bangkok Vanpool Commuter Services Towards Livable City. TUENGR Group:ม.ป.ท. 2015.