M. Irfan, Agustin Sastrawan Harahap, Khairul Usman, Hariadi, and Muhammad Nustan Hasibuan. “PROTOTIPE INDUSTRI OLAHRAGA EDU ORTRAD UNIMED”. Bina Guna Press (September 5, 2023): 1-64. Accessed May 13, 2026. https://jurnal.stokbinaguna.ac.id/index.php/BGP/article/view/1387.