Dyfyniad APA
HELLER, H., ET AL, & SPOONER, F. CLASSIC ARTICLES: A REFLECTION INTO THE FIELD OF MENTAL RETARDATION.
Dyfyniad Arddull Chicago
HELLER, H.W, ET AL, and F. SPOONER. CLASSIC ARTICLES: A REFLECTION INTO THE FIELD OF MENTAL RETARDATION.
Dyfyniad MLA
HELLER, H.W, et al. CLASSIC ARTICLES: A REFLECTION INTO THE FIELD OF MENTAL RETARDATION.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.