ทองพันธ์ก., ชัยชมชื่นส., and แสนราชจ. “THE DEVELOPMENT OF ONLINE-ACTIVITY BASED LEARNING SYSTEM ACCORDING TO R2D2 MODEL AND INTEGRATED WITH CREATING OF KNOWLEDGE MAP FOR DEVELOP TO ENHANCE TEACHER COMPETENCY”. Journal of Industrial Education, Vol. 15, no. 1, Apr. 2016, pp. 91-97, https://ph01.tci-thaijo.org/index.php/JIE/article/view/122267.