Rudi, Rudi Hartono, et al. “the INFLUENCE OF CIRCUIT TRAINING ON VO2MAX PERSERU FC FOOTBALL PLAYER RAMBAH UTAMA: PENGARUH LATIHAN CIRCUIT TRAINNING TERHADAP VO2MAX PEMAIN SEPAK BOLA PERSERU FC RAMBAH UTAMA”. Journal Of Sport Education and Training , vol. 4, no. 2, Mar. 2024, pp. 100-4, http://journal.upp.ac.id/index.php/joset/article/view/2104.