Effect of 4 Mat Constructivist Model Using Electronic Educational Resources on Systemic Thinking and Learning of Artistic Performance of Some Freestyle Wrestling Holds for Students. JPKO [Internet]. 2025 Jun. 30 [cited 2026 May 25];1(2):65-83. Available from: https://journalpejuang.web.id/index.php/jurnalpkopejuang/article/view/24