Dian Fitriana, et al. “IMPLEMENTASI MODIFIED DISTRIBUTION (MODI) METHOD UNTUK MEMINIMUMKAN BIAYA DISTRIBUSI SONGKOK PADA UD. ARIEF JAYA”. Prosiding SNasPPM, vol. 3, no. 1, Sept. 2018, pp. 425-30, http://prosiding.unirow.ac.id/index.php/SNasPPM/article/view/165.