Ridwansyah. “Utilization of Tofu Rounder Machine in the Small Medium Entrepreneurship (SME) of Tofu Chips in Galang, Deli Serdang Regency, North Sumatra ”. Journal of Saintech Transfer, vol. 2, no. 1, Nov. 2019, pp. 13-23, doi:10.32734/jst.v2i1.970.