This multiple-case study focuses on the practices and functions of customer reference marketing and on the ways through which customer references can be deployed as marketing assets. Analysis of 38 interviews with managers in four case companies suggests that customer references can be leveraged externally as marketing assets to (1) gain status-transfer effects from reputable customers, (2) signal passing a selection process, (3) concretize and demonstrate complex solutions, and (4) provide indirect evidence of experience, previous performance, technological functionality, and delivered customer value. Customer references can also be leveraged internally to (1) facilitate organizational learning, (2) advance offering development, (3) motivate personnel, and (4) develop understanding of customer needs, internal competencies, and delivered customer value. By identifying the practices and functions related to customer reference marketing, the paper deepens understanding of this highly relevant but relatively under-researched phenomenon and contributes to the literature on customer-based marketing assets. (c) 2010 Elsevier Inc. All rights reserved.