Citazione APA

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

Stile di citazione Chicago

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

Citazione MLA

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

Attenzione: Queste citazioni potrebbero non essere precise al 100%.