Maher, Michael J. The seven levels of communication : go from relationships to referrals / 7L : the seven levels of communication : go from relationships to referrals Michael J. Maher - Bloomington, Indiana : AuthorHouse, 2010 - 170 p. ; 26 cm. E-B7/06479 (original, 393.120đ) ISBN: 9781452033976 Subjects--Topical Terms: Business referrals Relationship marketing Subjects--Index Terms: Giao tiếp Kinh doanh Marketing Dewey Class. No.: 658.812