Dyfyniad APA

 Harrington, D. (2009).  Speaking of speech: Basic presentation skills for beginners.  Macmillan Languagehouse Ltd.

Dyfyniad Arddull Chicago

 Harrington, David.  Speaking of Speech: Basic Presentation Skills for Beginners.  Macmillan Languagehouse Ltd, 2009.

Dyfyniad MLA

 Harrington, David.  Speaking of Speech: Basic Presentation Skills for Beginners.  Macmillan Languagehouse Ltd, 2009.

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