O'Brien, E. (2015). How to make powerful speeches: A Step - by - Step Guide to Inspiring and Memorable Speeches. Ireland: The Reluctant Speakers Club.
Παραπομπή Chicago StyleO'Brien, Eamonn. How to Make Powerful Speeches: A Step - By - Step Guide to Inspiring and Memorable Speeches. Ireland: The Reluctant Speakers Club, 2015.
Παραπομπή MLAO'Brien, Eamonn. How to Make Powerful Speeches: A Step - By - Step Guide to Inspiring and Memorable Speeches. Ireland: The Reluctant Speakers Club, 2015.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.