Vander Zanden, J. (1978). Human development. Alfred.A.Knopf.
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Dyfyniad Arddull Chicago
Vander Zanden, James.W. Human Development. New York: Alfred.A.Knopf, 1978.
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Dyfyniad MLA
Vander Zanden, James.W. Human Development. Alfred.A.Knopf, 1978.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.