Mussen, P. H. (1979). Psychological development a life span approach. Harper & Row.
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Dyfyniad Arddull Chicago
Mussen, Paul Henry. Psychological Development a Life Span Approach. Cambridge: Harper & Row, 1979.
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Dyfyniad MLA
Mussen, Paul Henry. Psychological Development a Life Span Approach. Harper & Row, 1979.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.