Maya Ningrum DT, Rizkei Kurniawan, Mahyudi YV. The Effect of Cooperative Learning and Self Confidence on Service Volleyball At SMPN 4 Negara. jipes [Internet]. 2019Jul.1 [cited 2026Apr.4];5(1):63-8. Available from: http://103.8.12.212:33180/unj/index.php/jipes/article/view/14657