Maya Ningrum, D. T., Rizkei Kurniawan, & Mahyudi, Y. V. (2019). The Effect of Cooperative Learning and Self Confidence on Service Volleyball At SMPN 4 Negara. JIPES - JOURNAL OF INDONESIAN PHYSICAL EDUCATION AND SPORT, 5(1), 63-68. Retrieved from http://103.8.12.212:33180/unj/index.php/jipes/article/view/14657