Valeriana Lukitosari, Adhella Dwi Nur Saidah, & Titik Mudjiati. (2017). Pemodelan Biaya Garansi Dua Dimensi (Studi kasus : PT. Indomobil Prima Niaga Sidoarjo). imits: ournal of athematics and ts pplications, 14(2), 157–167. etrieved from https://journal.its.ac.id/index.php/limits/article/view/5303