Dyfyniad APA

Piaget, J. (1970). Science of education and the psychology of the child. Penguin Books.

Dyfyniad Arddull Chicago

Piaget, Jean. Science of Education and the Psychology of the Child. New York: Penguin Books, 1970.

Dyfyniad MLA

Piaget, Jean. Science of Education and the Psychology of the Child. Penguin Books, 1970.

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