Cita APA (7th ed.)
Piaget Jean. (1967). Six Psychological studies (ed.). Vintage Books.
Cita Chicago (17th ed.)
Piaget Jean. Six Psychological Studies. ed. New York: Vintage Books, 1967.
Cita MLA (9th ed.)
Piaget Jean. Six Psychological Studies. ed. Vintage Books, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.