Dick S. Tuazon, Noel T. Florencondia, Christopher M. Ladignon, and Kenia Allena T. Santos. “Enhancing Public Service Through ISO 9001: Evaluating QMS Maturity of Selected Local Government Unit (LGU) in Tarlac Province”. International Journal of Progressive Research in Science and Engineering, vol. 6, no. 05, June 2025, pp. 193-9, https://journal.ijprse.com/index.php/ijprse/article/view/1207.