1. Australian Institute for Teaching and School Leadership (2011).Australian Professional Standard for Principals. Available in www.aitsl.edu.au

2. Bichsel, Jillian Anthony(2008). Professional Development Needs and Experiences of Secondary Principals in Southwestern Pennsylvania. Submitted to the Graduate Faculty of The School of Education in partial fulfillment of the requirements for the degree of Doctor of Education

3. Bitterová.M. Hašková.A.& Pisonova.M(2014). School Leader`s Competencies in Management Area. Social and Behavioral Sciences.vol.149.pp.114-118

4. British Columbia Principals’ & Vice-Principals’ Association(2013). Leadership Standards for Principals and Vice-Principals in British Columbia. Available in www.bcpvpa.bc.ca

5. Bush, Tony (2008). Leadership and Management Development in Education. Sage Publications.

6. Canole, M., & Young, M. (2013). Standards for educational leaders: An analysis. Washington, DC.

7. Cavazos, A. J., & Ovando, M. N. (2012). Important competencies for the selection of effective school leaders: principals' perceptions (Doctoral dissertation, University of Texas).

8. Farkas, S., Johnson, J., & Duffett, A. (2003). Rolling up their sleeves: Superintendents and principals talk about what’s needed to fix public schools. New York: Public Agenda.

9. Farmer, J., Hauk, S., & Neumann, A. M. (2005). Negotiating reform: Implementing process standards in culturally responsive professional development. The High School Journal, 88(4), 59-71.

10. Griffith, Helen Virginia(2012). The California League of Middle Schools’ Professional Development for Principals: A Model of Coaching and Mentoring. A dissertation submitted to the faculty of San Diego State University. In partial fulfillment of the requirements for the degree Doctor of Educational Leadership.

11. Mestry, R. &Grobler, B. R. (2004). The Training and Development of Principals to Manage Schools Effectively Using the Competence Approach, ISEA, 32 (3), 2 – 19.

12. Mestry, Raj and Singh, Prakash(2007). Continuing professional development for principals :a South African perspective. South African Journal of Education, Vol27(3).477–490

13. Pashiardis, Petros & Brauckmann, Stefan(2009). Professional development needs of school principals. Commonwealth Education Partnerships.

14. Pont, B. (2013). Learning Standards, Teaching Standards and Standards for School Principals: A Comparative Study (No. 99). OECD Working Papers.

15. Reynolds, M. E. (2010). The effect of context on teachers’ ability to innovate with information and communication technologies in secondary schools (Doctoral dissertation, University of Pretoria).

16. Schleicher, A. (2012). Preparing Teachers and Developing School Leaders for the 21st Century: Lessons from around the World, OECD Publishing.

17. Shyr, W. J. (2017). Developing the Principal Technology Leadership Competency Indicators for Technical High Schools in K-12 in Taiwan. Eurasia Journal of Mathematics, Science and Technology Education, 13(6), 2085-2093.

18. Strauss, A., & Corbin, J. (2008). The basics of qualitative research (3rd ed.) Los Angeles, CA: Sage.

19. Supovitz,J.,sirinides,P.,& may,H. (2010).How principals and peer influence teaching and learning.Educational administration Quarterly,46,(1),31-56

20. UNESCO. (2012). Pacific professional standards for school principals. Pacific islands forum secretariat.

21. Viitala . Riitta , (2005).”Perceived Development Needs Of Managers Compared To an Integrated Management Competency Model” , Journal Of WorkPlace Learning ; Vol . 17, No.7.

22. Waters, T., Marzano, R. J., & McNulty, B. (2003). Balanced Leadership: What 30 Years of Research Tells Us about the Effect of Leadership on Student Achievement. A Working Paper.

23. Young, T. L. (2016). A qualitative phenomenological study of managers to reduce conflict between flight attendants after a merger (Doctoral dissertation, University of Phoenix).