Cita APA (7a ed.)
Piaget, J. (1971). The Child's Conception of Movement and Speed.
Cita estilo Chicago (17a ed.)
Piaget, Jean. The Child's Conception of Movement and Speed. 1971.
Cita MLA (9a ed.)
Piaget, Jean. The Child's Conception of Movement and Speed. 1971.
Precaución: Estas citas no son 100% exactas.