Futrel, C. M. (2006). ABC''s of relationship selling through service. McGraw-Hill.
Παραπομπή Chicago StyleFutrel, Charles M. ABC''s of Relationship Selling Through Service. McGraw-Hill, 2006.
Παραπομπή MLAFutrel, Charles M. ABC''s of Relationship Selling Through Service. McGraw-Hill, 2006.
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