Maulidin, A. H., H. Pamungkas, H. Yusuf, M. Nidommuddin, and R. Aofal. “The Effect of Sit and Reach Test Exercise on Hamstring Muscle Flexibility of Persikoba Football Players”. Jurnal Pendidikan Jasmani (JPJ), Vol. 5, no. 3, Apr. 2025, pp. 322-8, doi:10.55081/jpj.v5i3.3849.