Stravakou, Pelagia, and Evangelia Lozgka. “School Principals As Leaders: Pre-Service and In-Service Teachers’ Perspective”. New Trends and Issues Proceedings on Humanities and Social Sciences 5, no. 3 (December 28, 2018): 109-117. Accessed June 27, 2019. https://sproc.org/ojs/index.php/pntsbs/article/view/3916.