NUGROHO, UNTUNG, and RIMA FEBRIANTI. “ANALISIS BIOMEKANIKA BACKHAND GROUNDSTROKE TENIS LAPANGAN ATLET PORPROV KLATEN”. JURNAL ILMIAH PENJAS (Penelitian, Pendidikan dan Pengajaran) 5, no. 2 (July 13, 2019). Accessed March 28, 2024. http://ejournal.utp.ac.id/index.php/JIP/article/view/941.