M. Waseem, T. F. Solehria, and A. Bashir, “Exploring Factors Affecting Headteachers in Becoming Transformational Leaders at the Private Secondary School Level in Korangi East Karachi: A Qualitative Study”, TK, vol. 5, no. 1, pp. 122–136, Feb. 2026, doi: 10.55737/tk/v5i1.51124.