Carnegie, D. (1956). How to develop self-confidence and influence people by public speaking. Pocket Books.
Cita Chicago (17th ed.)Carnegie, Dale. How to Develop Self-confidence and Influence People by Public Speaking. Delhi: Pocket Books, 1956.
Cita MLA (8th ed.)Carnegie, Dale. How to Develop Self-confidence and Influence People by Public Speaking. Pocket Books, 1956.
Atenció: Aquestes cites poden no estar 100% correctes.