R. A. . Santosa, “Tingkat Pemahaman Wasit C-1 Dan C-2 Asosiasi Provinsi Pssi Jambi Tentang Laws Of The Game 2020: Level Of Understanding Of Referees C-1 And C-2 Of Pssi Jambi Provincial Association On Laws Of The Game 2020”, CSP, vol. 5, no. 2, Nov. 2021.