Carnegie, D. (1956). How to develop self-confidence and influence people by public speaking. New York: Pocket Books.
Dyfyniad Arddull ChicagoCarnegie, Dale. How to Develop Self-confidence and Influence People By Public Speaking. New York: Pocket Books, 1956.
Dyfyniad MLACarnegie, Dale. How to Develop Self-confidence and Influence People By Public Speaking. New York: Pocket Books, 1956.
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