Vieira, W. (2008). The new professional salesman: Meeting challenges in the 21st century. Response Books.
Chicago-Zitierstil (17. Ausg.)Vieira, Walter. The New Professional Salesman: Meeting Challenges in the 21st Century. New Delhi: Response Books, 2008.
MLA-Zitierstil (9. Ausg.)Vieira, Walter. The New Professional Salesman: Meeting Challenges in the 21st Century. Response Books, 2008.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.