Dale Harbison Carnegie was an American writer and lecturer and the developer of famous courses in self-improvement, salesmanship, corporate training, public speaking, and interpersonal skills. Source: wikipedia
Dale Carnegie (duplicate)
Detaloj pri la aŭtoro
- Naskiĝis:
- 23-a de novembro 1888
- Mortis:
- 31-a de oktobro 1955
