O'Brien, E. (2015). How to make powerful speeches: A Step - by - Step Guide to Inspiring and Memorable Speeches. Ireland: The Reluctant Speakers Club.
Trích dẫn kiểu ChicagoO'Brien, Eamonn. How to Make Powerful Speeches: A Step - By - Step Guide to Inspiring and Memorable Speeches. Ireland: The Reluctant Speakers Club, 2015.
MLA引文O'Brien, Eamonn. How to Make Powerful Speeches: A Step - By - Step Guide to Inspiring and Memorable Speeches. Ireland: The Reluctant Speakers Club, 2015.
警告：这些引文格式不一定是100％准确.