Cita APA (7a ed.)
Piaget, J., Bieler, M., & Gabain, M. (1972). The child's conception of physical causality.
Cita estilo Chicago (17a ed.)
Piaget, Jean, M.G Bieler, y Marjorie Gabain. The Child's Conception of Physical Causality. 1972.
Cita MLA (9a ed.)
Piaget, Jean, et al. The Child's Conception of Physical Causality. 1972.
Precaución: Estas citas no son 100% exactas.