Ambrose Sandra Telemarketing skills : Training manual / S. Ambrose, D. Hellmuth. - Englewood Cliffs, NJ : Prentice Hall, 1990. - xiv, 272 p. : ill. ; 29 cm. Includes appendix and index ISBN: 0-13-902677-0 Subjects--Topical Terms: Telemarketing--study and teaching