สารทองทีระชา, ศุภวราสุวัฒน์ปิยะ, and สุนทรกนกพงศ์วิสุทธิ์. “DEVELOPMENT OF AN ONLINE GRADING AND SUBMISSION SYSTEM: A CASE STUDY OF VOCATIONAL EDUCATION INSTITUTE CENTER 1”. Journal of Industrial Education 15, no. 1 (April 29, 2016): 98-105. Accessed February 21, 2020. https://ph01.tci-thaijo.org/index.php/JIE/article/view/122269.