Dale Carnegie. (2011). How to develop self confidence and influence people by public speaking. Harmony books.
Chicago Edition CitationDale Carnegie. How to Develop Self Confidence and Influence People by Public Speaking. Kozhikode: Harmony books, 2011.
Cita MLADale Carnegie. How to Develop Self Confidence and Influence People by Public Speaking. Harmony books, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.