Firman Ababil Pagarudin Malo, and Nurhidayat Nurhidayat. “SURVEI KEMAMPUAN PUKULAN SERVIS PADA MAHASISWA UKM TENIS LAPANGAN UNIVERSITAS MUHAMMADIYAH SURAKARTA”. Journal of Innovation Research and Knowledge, vol. 1, no. 5, Oct. 2021, pp. 845-54, doi:10.53625/jirk.v1i5.477.