Y. Andika, K. Firdaus, R. Irawan, N. W. Pranoto, and F. Zarya, “The effect of physical fitness, economic status and learning motivation on learning outcomes (PJOK) at Smp El-Ma’arif Boarding School West Pasaman Regency”, j. olahraga prestasi, vol. 19, no. 3, pp. 242–251, Sep. 2023.