Yuliada, Yogi, Widiastuti Widiastuti, and Hernawan Hernawan. 2021. “THE EFFECTIVENESS OF A BUTTERFLY STYLE SWIMMING SKILL LEARNING MODEL FOR JUNIOR HIGH”. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW 7 (1):65-77. https://journal.unj.ac.id/unj/index.php/ijer/article/view/19566.