Ikma Putra, Arief, et al. “RANCANG BANGUN MESIN AMPLAS DENGAN SISTEM MEKANIS BELT”. Jurnal Teknik Mesin, vol. 11, no. 2, June 2019, pp. 63-69, http://ejournal2.pnp.ac.id/index.php/jtm/article/view/169.