Cita APA

Richmond, P. G. (1970). An introduction to Piaget. Routledge & Kegan Paul.

Chicago Edition Citation

Richmond, P G. An Introduction to Piaget. London: Routledge & Kegan Paul, 1970.

Cita MLA

Richmond, P G. An Introduction to Piaget. Routledge & Kegan Paul, 1970.