Sangsawang, N., and S. . Pankham. “Causal Relationship Model of Intention to Use Food Delivery Service Via Grab Food Application of Customer in Bangkok and Vicinity”. Journal of Arts Management, vol. 4, no. 2, July 2020, pp. 503-20, https://so02.tci-thaijo.org/index.php/jam/article/view/242074.