Tong X, Vintwatanakhun W. A Study of the Relationship Between Teachers’ Perceptions of Principal’s Transformational Leadership Style and Their Perceptions of Professional Development in Ning’er Vocational High School, Yunnan, China. scho [Internet]. 2021Oct.18 [cited 2024Apr.23];13(2):99. Available from: http://www.assumptionjournal.au.edu/index.php/Scholar/article/view/4685