Syahruddin, Syahruddin, Yohanis Manfred Mandosir, I Putu Eka Wijaya Putra, Evi Sinaga, and Budi Kristanto. 2021. “The Effect of Vitamin C Supplementation on Maximum Physical Activity Toward Leucocytes Total”. Jurnal SPORTIF : Jurnal Penelitian Pembelajaran 7 (1), 105-23. https://doi.org/10.29407/js_unpgri.v7i1.15715.