Gardner, R. A. (1973). Understanding children. J. Aronson.
Chicago Style aipamenaGardner, Richard A. Understanding Children. New York: J. Aronson, 1973.
MLA aipamenaGardner, Richard A. Understanding Children. J. Aronson, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.