HASAN, SINGGIH NUR. 2019. “EFFORTS TO INCREASE A BULLETS SHOT USING A PLASTIC BALL IN GRADE 10 STATE SENIOR HIGH SCHOOL 1 AMPEL, AMPEL, BOYOLALI IN THE YEAR OF 2016/2017”. Journal Of Indonesia Sport Education and Adapted Physical Education (JISEAPE) 1 (1). https://ejournal.utp.ac.id/index.php/JISEAPE/article/view/912.