Cita APA (7th ed.)
Piaget, J. (1971). The Child's Conception of Movement and Speed.
Cita Chicago (17th ed.)
Piaget, Jean. The Child's Conception of Movement and Speed. 1971.
Cita MLA (9th ed.)
Piaget, Jean. The Child's Conception of Movement and Speed. 1971.
Atenció: Aquestes cites poden no estar 100% correctes.