Cita APA (7a ed.)
Richmond, P. G. (1970). An introduction to Piaget. Basic Books.
Cita Chicago Style (17a ed.)
Richmond, P. G. An Introduction to Piaget. New York: Basic Books, 1970.
Cita MLA (9a ed.)
Richmond, P. G. An Introduction to Piaget. Basic Books, 1970.
Precaución: Estas citas no son 100% exactas.