Carnegie, D. (1940). How to win friend and influences people (6ª ed.). Pocket Books.
Chicago-referens (17:e uppl.)Carnegie, Dale. How to Win Friend and Influences People. 6ª ed. Pocket Books, 1940.
MLA-referens (9:e uppl.)Carnegie, Dale. How to Win Friend and Influences People. 6ª ed. Pocket Books, 1940.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.