Suryadi, A. ., Islami, M. C. P. A. ., Taufiq, S. I. ., & Santoso, B. . (2021). Company Quality Performance Using Customer Satisfaction Index Methods and Importance Performance Analysis at PT. XYZ. Nusantara Science and Technology Proceedings, 244-250. https://doi.org/10.11594/nstp.2021.1438