Schiffman, S. (2009). Sales presentation techniques; That reality work.
Chicago Edition CitationSchiffman, Stephan. Sales Presentation Techniques; That Reality Work. Adams Media Corporation, Avon, 2009.
Cita MLASchiffman, Stephan. Sales Presentation Techniques; That Reality Work. 2009.
Atenció: Aquestes cites poden no estar 100% correctes.