Trimintarsih, Titin. “Fishbone Analysis Method Adaptation in UD Nugraha Jaya Kediri Defective Products Quality Control”. Proceedings of Islamic Economics, Business, and Philanthropy 2, no. 2 (December 14, 2022): 157–174. Accessed May 20, 2024. https://jurnalfebi.iainkediri.ac.id/index.php/proceedings/article/view/1132.