Dyfyniad APA
OMS. (1988). INTERNATIONAL REFERENCE LIST OF RESOURCE AND RESEARCH CENTRES IN THE FIELD OF MENTAL RETARDATION. OMS.
Dyfyniad Arddull Chicago
OMS. INTERNATIONAL REFERENCE LIST OF RESOURCE AND RESEARCH CENTRES IN THE FIELD OF MENTAL RETARDATION. GINEBRA: OMS, 1988.
Dyfyniad MLA
OMS. INTERNATIONAL REFERENCE LIST OF RESOURCE AND RESEARCH CENTRES IN THE FIELD OF MENTAL RETARDATION. OMS, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.