Karl Bach. (1979). Selling is simple ... if you don't make it complicated. San Francisco, California: Advance Books.
Chicago Style CitationKarl Bach. Selling Is Simple ... If You Don't Make It Complicated. San Francisco, California: Advance Books, 1979.
Cita MLAKarl Bach. Selling Is Simple ... If You Don't Make It Complicated. San Francisco, California: Advance Books, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.