ROPER, P. (1990). SPECIAL OLYMPICS VOLUNTEERS' PERCEPTIONS OF PEOPLE WITH MENTAL RETARDATION.
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Dyfyniad Arddull Chicago
ROPER, P.A. SPECIAL OLYMPICS VOLUNTEERS' PERCEPTIONS OF PEOPLE WITH MENTAL RETARDATION. 1990.
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Dyfyniad MLA
ROPER, P.A. SPECIAL OLYMPICS VOLUNTEERS' PERCEPTIONS OF PEOPLE WITH MENTAL RETARDATION. 1990.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.