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APA-viiteHeseltine, P. (1987). Play and creativity: Repost of the 10th Conference of the International Association for the Child's Right to Play (IPA). IPA.
Chicago-tyylinen lähdeviittausHeseltine, Peter. Play and Creativity: Repost of the 10th Conference of the International Association for the Child's Right to Play (IPA). Stockholm: IPA, 1987.
MLA-viiteHeseltine, Peter. Play and Creativity: Repost of the 10th Conference of the International Association for the Child's Right to Play (IPA). IPA, 1987.
Harvard-tyylinen lähdeviittausHeseltine, P. 1987. Play and creativity: Repost of the 10th Conference of the International Association for the Child's Right to Play (IPA). Stockholm: IPA.
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