Cita APA (7th ed.)
Piaget Jean. (1969). The child's conception of physical causality (ed.). Littlefield.
Cita Chicago (17th ed.)
Piaget Jean. The Child's Conception of Physical Causality. ed. New Jersey: Littlefield, 1969.
Cita MLA (9th ed.)
Piaget Jean. The Child's Conception of Physical Causality. ed. Littlefield, 1969.
Atenció: Aquestes cites poden no estar 100% correctes.