Παραπομπή APA

Karl Bach. (1979). Selling is simple ... if you don't make it complicated. San Francisco, California: Advance Books.

Παραπομπή Chicago Style

Karl Bach. Selling Is Simple ... If You Don't Make It Complicated. San Francisco, California: Advance Books, 1979.

Παραπομπή MLA

Karl Bach. Selling Is Simple ... If You Don't Make It Complicated. San Francisco, California: Advance Books, 1979.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.