Tongwinitsilp, Tienchai, Mana Poolum, and Wanida Norah. 2011. “Development Web-Based Instruction (WBI) of The Course Swimming Strategies and Management”. Academic Journal of Thailand National Sports University 3 (1). Chonburi, Thailand:65-72. https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/252193.