By Bakx A.   Sanden J.   Sijtsma K.   Croon M.   Vermetten Y.   in Higher Education

ISSN:0018-1560|51|1|71-104

Springer Publishing Company ‎(2006)‎

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By Hamers J.H.M.   de Koning E.   Sijtsma K.   in Contemporary Educational Psychology

ISSN:0361-476X|23|2|132-148

Academic Press‎(1998)‎

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By de Koning E.   Hamers J.H.M.   Sijtsma K.   Vermeer A.   in Developmental Review

ISSN:0273-2297|22|2|211-241

Academic Press‎(2002)‎

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