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Piaget, Jean (1952), Boring, Edwin G.; Werner, Heinz; Langfeld, Herbert S. και άλλοι, επιμ., «Jean Piaget.», A History of Psychology in Autobiography, Vol IV. (Worcester: Clark University Press): 237–256, doi:10.1037/11154-011, http://content.apa.org/books/11154-011, ανακτήθηκε στις 2021-02-28
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Dunn, Judy; Hughes, Claire (2001). «"I Got Some Swords And You're Dead!": Violent Fantasy, Antisocial Behavior, Friendship, And Moral Sensibility In Young Children». Child Development72 (2): 491–505. doi:10.1111/1467-8624.00292. PMID11333080.
Davidson Films, Inc. (10 Αυγούστου 2010). «Classic Piaget Volume 1». Αρχειοθετήθηκε από το πρωτότυπο στις 18 Οκτωβρίου 2022. Ανακτήθηκε στις 16 Ιουνίου 2023 – μέσω YouTube.CS1 maint: Unfit url (link)