Novita Sary M. THe EFFECTIVENESS WATER INTRODUCTION LEARNING MODEL (MNS) BASED ON PLAY IN SWIMMING SPORT. IJER [Internet]. 2019 Jul. 1 [cited 2024 Nov. 22];6(1):159-67. Available from: https://journal.unj.ac.id/unj/index.php/ijer/article/view/23254