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Charlotte, N.C: IAP, Information Age Publishing, c2009
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Informa UK Limited, 2005
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Informa UK Limited, 2003
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Informa UK Limited, 1998
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Informa UK Limited, 1997
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Wiley, 2005
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Informa UK Limited, 1999
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SAGE Publications, 1991
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American Educational Research Association (AERA), 1991
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SAGE Publications, 1991
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American Educational Research Association (AERA), 1991