Walters, Ray (September 5, 1982). "Paperback Talk". New York Times. Diakses tanggal April 7, 2008.
web.archive.org
The Financial Post on Dale Carnegie: "Dale Carnegie's How to Win Friends and Influence People, the gold standard of the genre, has sold more than 15 million copies since it was first published in 1937." (April 24, 2008)