By de Jong R.   Westerhof K.J.   Creemers B.P.M.   in Educational Research and Evaluation

ISSN:1380-3611|6|2|130-157

Routledge Ltd‎(2000)‎

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By Jong R. de   Westerhof K.J.   Kruiter J.H.   in School Effectiveness and School Improvement

ISSN:0924-3453|15|1|3-31

Routledge Ltd‎(2004)‎

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