Futrell, Charles M. ABC's of relationship selling through service / Charles M. Futrell. - 12th ed. (Int. ed.) - New York : McGraw-Hill Irwin, c2013. - xxxiv, 494 p. : ill. ; 25 cm. Includes bibliographical references and index. ISBN: 9780071326292 (pbk.) Subjects--Topical Terms: Selling.