Dyfyniad APA

American Journal of Speech-Language Pathology. American Speech-Language-Hearing Association.

Dyfyniad Arddull Chicago

American Journal of Speech-Language Pathology. American Speech-Language-Hearing Association.

Dyfyniad MLA

American Journal of Speech-Language Pathology. American Speech-Language-Hearing Association.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.