Futrell, C. (2005). ABC's of relationship selling through service (8e.). New York: McGraw-Hill/Irwin.
استشهاد بنمط شيكاغوFutrell, Charles. ABC's of Relationship Selling Through Service. 8e. New York: McGraw-Hill/Irwin, 2005.
MLA استشهادFutrell, Charles. ABC's of Relationship Selling Through Service. 8e. New York: McGraw-Hill/Irwin, 2005.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.