Cita APA (7a ed.)
Phillips, J. L. The Origins of Intellect: Piaget's Theory. W.H. Freeman and Company.
Cita estilo Chicago (17a ed.)
Phillips, John L. The Origins of Intellect: Piaget's Theory. San Francisco, EUA: W.H. Freeman and Company.
Cita MLA (9a ed.)
Phillips, John L. The Origins of Intellect: Piaget's Theory. W.H. Freeman and Company.
Precaución: Estas citas no son 100% exactas.