Carnegie, D. (1940). How to win friend and influences people (6ª ed.). Pocket Books.
Citace podle Chicago (17th ed.)Carnegie, Dale. How to Win Friend and Influences People. 6ª ed. Pocket Books, 1940.
Citace podle MLA (9th ed.)Carnegie, Dale. How to Win Friend and Influences People. 6ª ed. Pocket Books, 1940.
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