Tohutoro APA (7th ed.)
Richmond, P. G. (1970). An introduction to Piaget. Basic Books.
Tohutoru Kātū Chicago (17th ed.)
Richmond, P. G. An Introduction to Piaget. New York: Basic Books, 1970.
Tohutoro MLA (9th ed.)
Richmond, P. G. An Introduction to Piaget. Basic Books, 1970.
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