5Thomson, S. D. (Ed.) (1993). Principals for our changing schools: The Knowledge and skill base. Fairfax, VA: National Policy Board for Educational Administration.
6Ogawa, R. T.,Crowson, R. L. & Goldring, E. B. (1999). Enduring dilemmas of school organization. In J. Murphy & K.S.Louis(Eds. ), Handbook of research on educational administration (second edition). San Francisco: Jossey- Bass Publishers, p. 283.
9Donmoyer, R. (1999) . The continuing quest for a knowledge base: 1976-1998. In J. Murphy & K.S. Louis(Eds. ),Handbook of research on educational administration (second edition) . San Francisco: Jossey - Bass Publishers. p. 38.
10Culbertson, J. A. (1988). A century's quest for a knowledge base, In N. J. Boyan(Ed. ), Handbook of research on edueational administration. New York : Longman Inc. p. 23.
