Sroidokson, C. . “THE LESSON ON SELF DEFENSE WITH AIKIDO BASED ON SIMPSONS PRACTICE SKILL DEVELOPMENT APPROACH”. Academic Journal of Thailand National Sports University, vol. 12, no. 2, May 2020, pp. 173-8, https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/244477.