WOLFENSBERGER, W. (1991). REFLECTIONS ON A LIFETIME IN HUMAN SERVICES AND MENTAL RETARDATION.
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Dyfyniad Arddull Chicago
WOLFENSBERGER, W. REFLECTIONS ON A LIFETIME IN HUMAN SERVICES AND MENTAL RETARDATION. 1991.
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Dyfyniad MLA
WOLFENSBERGER, W. REFLECTIONS ON A LIFETIME IN HUMAN SERVICES AND MENTAL RETARDATION. 1991.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.