Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Damiani Jonathan,International Trends and Lessons in School Leadership : A Meta-Analysis of Research on Teaching Principals,NUCB journal of language culture and communication,13443984,Nagoya University of Commerce & Business Administration,2014,15,2,25-34,https://cir.nii.ac.jp/crid/1570291227960068352,