- Author: Dale Carnegie Training
- Language: Spanish
- Year: 2019
- Author: Dale Carnegie
- Language: Italian
- Year: 2018
- Author: Dale Carnegie
- Language: English
- Year: 2011
- Author: Dale Carnegie
- Language: English
- Author: Dale Carnegie Training (Firm)
- Language: English
- Year: 2009
- Author: Dale Carnegie, Stuart R. Levine, Michael A. Crom
- Language: English
- Year: 2007
- Author: Dale carnegie
- Language: Spanish
- Year: 1940
- Author: Dale Carnegie
- Language: Italian
- Year: 2019
- Author: Dale Carnegie
- Language: English
- Year: 2020
- Author: Dale Carnegie
- Language: Italian