Cofnodi Dyfyniadau
Dyfyniad APA
Ginsburg, H., & Opper, S. (1979). Piaget's theory of intellectual development (2nd ed.). Prentice - hall.
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Dyfyniad Arddull Chicago
Ginsburg, Herbert, and Sylvia Opper. Piaget's Theory of Intellectual Development. 2nd ed. New Jersey: Prentice - hall, 1979.
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Dyfyniad MLA
Ginsburg, Herbert, and Sylvia Opper. Piaget's Theory of Intellectual Development. 2nd ed. Prentice - hall, 1979.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.