Pulaski, M. A. S. (1971). Understanding Piaget: An introduction to children's cognitive development. Harper & Row.
Citace podle Chicago (17th ed.)Pulaski, Mary Ann Spencer. Understanding Piaget: An Introduction to Children's Cognitive Development. New York: Harper & Row, 1971.
Citace podle MLA (9th ed.)Pulaski, Mary Ann Spencer. Understanding Piaget: An Introduction to Children's Cognitive Development. Harper & Row, 1971.
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