Wali , A.D Majid Shandi, et al. “The Effect of Variation in Concentration Level (ATP) and Its Relationship to Endurance Status As a Determinant of Selection in Some Games and Sports Activities”. International Journal of Psychosocial Rehabilitation, vol. 24, no. 4, Apr. 2020, pp. 9825-34, https://doi.org/10.61841/sm2yys38.