Luthvina, Ridha, Rika Ampuh Hadiguna, and Jonrinaldi Jonrinaldi. 2019. “Model Penilaian Pemasok Bahan Olah Karet (Bokar)”. Jurnal Optimasi Sistem Industri 18 (2):186–198. http://josi.ft.unand.ac.id/index.php/josi/article/view/177.