PRATAMA, R. R.; SATRIA, M. H.; DEFLIYANTO, D.; RAMADHAN, A. .; HIDAYAT, A. . Comparison of the Effects of Circuit Training and Fartlek on the Intermittent Endurance of Unsri United Soccer Players. Indonesian Journal of Physical Education and Sport Science, v. 6, n. 2, p. 455-467, 13 Jun. 2026.