Purnomo, Muhammad Ridwan Andi, and Iswoyo Seno Saputro. 2024. “Product Pricing Based on Customer Perception Quality and Service Convenience Using Interval Type-2 Fuzzy Logic System”. International Journal of Industrial Optimization 5 (2):161-76. http://journal2.uad.ac.id/index.php/ijio/article/view/10825.