Harrington, D. (2009). Speaking of speech: Basic presentation skills for beginners. Boston: Macmilan.
Παραπομπή Chicago StyleHarrington, David. Speaking of Speech: Basic Presentation Skills for Beginners. Boston: Macmilan, 2009.
Παραπομπή MLAHarrington, David. Speaking of Speech: Basic Presentation Skills for Beginners. Boston: Macmilan, 2009.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.