2015 - The Challenger Customer Selling to the Hidden Influencer Who Can Multiply Your Results (Hardcover) → Audio CD ISBN-13: 9781591848158 ISBN-10: 1591848156 Genre: Business & Money ? 2011 - The Challenger Sale Taking Control of the Customer Conversation (Hardcover) → Audio CD ISBN-13: 9781591844358 ISBN-10: 1591844355 Genre: Business & Money ? |