Suwimol Pratomsiripaisan สุวิมล ปฐมสิริไพศาล, and Chulaporn Kobjaiklang จุฬาภรณ์ ขอบใจกลาง. 2018. “Factors Affecting Customer Satisfactions in Digital Technology for Express Services in Thailand”. Dusit Thani College Journal 11 (3):110-25. https://so01.tci-thaijo.org/index.php/journaldtc/article/view/118509.