Thongsap , S., & Kajornsilp , J. (2020). THE EFFECTS OF CRAWL STROKE SKILLS TRAINED BY EXPLICIT TEACHING FOR 1ST GRADE NON – SWIMMERS AT PIBOONBUMPEN DEMONSTRATION SCHOOL, BURAPHA UNIVERSITY. Academic Journal of Thailand National Sports University, 12(1), 188–195. retrieved from https://he02.tci-thaijo.org/index.php/TNSUJournal/article/view/244320