Lohonsedu Jeanneth Angelina. “ANALISIS PEMILIHAN SUPPLIER DI UD. SUMBER REJEKI SINGOSARI - MALANG ”. Jurnal Valtech 1, no. 1 (December 16, 2019): 131-137. Accessed May 16, 2024. https://ejournal.itn.ac.id/index.php/valtech/article/view/115.