Wasserman, E. ., S. . Ben-eli, O. . Yehoshua, and R. . Gal. “Relationship Between the Principal’s Leadership Style and Teacher Motivation”. International Journal of Learning, Teaching and Educational Research, vol. 15, no. 10, Sept. 2016, pp. 180-92, https://ijlter.net/index.php/ijlter/article/view/890.