Pipatpongumpai, Arthitiya, Tatre Jantarakolica, Korbkul Jantarakolica, Woraphon Wattanatorn, Thanomsuk Suwannoi, and Massaporn Cheuathonghua Massaporn Cheuathonghua. 2022. “Factors Influencing the Purchase Intention of Online Learning Courses”. Journal for Developing the Social and Community 9 (3). Bangkok, Thailand:223-40. https://so03.tci-thaijo.org/index.php/rdirmu/article/view/259075.