Wungchob, S., W. Potisarn, W. Nualnang, S. Gluaythong, and T. Chuachan. “Services Effectiveness of Electronic Documents System at Surindra Rajabhat University”. Trends of Humanities and Social Sciences Research, vol. 8, no. 1, June 2020, pp. 278-9, https://so03.tci-thaijo.org/index.php/Humanties-up/article/view/216212.