Niqab, Muhammad, Sujit Singh, and Sadia Shaikh. “Fuzzy Based Principal’s Leadership Skills Assessment Model for Secondary Schools”. JISR management and social sciences & economics 17, no. 2 (December 31, 2019): 67–84. Accessed April 30, 2024. https://jisrmsse.szabist.edu.pk/index.php/szabist/article/view/73.