Hoffmann, N. (2013). Loyalty Schemes in Retailing: A Comparison of Stand-alone and Multi-partner Programs. Peter Lang International Academic Publishing Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHoffmann, Nicolas. Loyalty Schemes in Retailing: A Comparison of Stand-alone and Multi-partner Programs. Bern: Peter Lang International Academic Publishing Group, 2013.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHoffmann, Nicolas. Loyalty Schemes in Retailing: A Comparison of Stand-alone and Multi-partner Programs. Peter Lang International Academic Publishing Group, 2013.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.