Mubarok, Mochamad, DAN 		Kharisma, Yudhi.
" Perbandingan Metode Latihan Interval Ekstensif dan Intensif Terhadap Peningkatan Daya Tahan Aerobik" <em>Physical Activity Journal (PAJU)</em> [Online], Volume 3 Nomor 1 (31 October 2021)