Perkins, H. V. (1997). Human development and learning (2d ed.). Wadsworth Pub.
Čikaški stil citiranja (17. izdanje)Perkins, Hugh V. Human Development and Learning. 2d ed. Belmont, Calif: Wadsworth Pub, 1997.
MLA način citiranja (9. izdanje)Perkins, Hugh V. Human Development and Learning. 2d ed. Wadsworth Pub, 1997.
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