Futrell, C. M. (2007). ABC's of relationship selling through service. New York: McGraw-Hill.
استشهاد بنمط شيكاغوFutrell, Charles M. ABC's of Relationship Selling Through Service. New York: McGraw-Hill, 2007.
MLA استشهادFutrell, Charles M. ABC's of Relationship Selling Through Service. New York: McGraw-Hill, 2007.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.