Karl Bach. (1979). Selling is simple ... if you don't make it complicated. San Francisco, California: Advance Books.
استشهاد بنمط شيكاغوKarl Bach. Selling Is Simple ... If You Don't Make It Complicated. San Francisco, California: Advance Books, 1979.
MLA استشهادKarl Bach. Selling Is Simple ... If You Don't Make It Complicated. San Francisco, California: Advance Books, 1979.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.