Business.com. Retrieved from http://www.business.com/ecommerce/quick-tips-for-upselling-and-cross-selling/ Maximizer. (2015, June 24). 5 Basic Upselling Techniques - Maximizer Blog. Retrieved from http://www.maximizer.com/blog/5-basic-upselling-techniques/ Bohutinsky, C.H. (1990). The Sell up Potential of Airline Demand. M.S. Thesis, Massachusetts Institute of Technology, Cambridge. Lazazzera, R. (2015, March 4). How to Increase Revenue and Improve the Customer Experience with Upselling and Cross-Selling. Retrieved March 26, 2016, from Shopify: https://www.shopify.co.nz/blog/17579484-how-to-increase-revenue-and-improve-the-customer-experience-with-upselling-and-cross-selling Levine, L. (1996). "Why cross-selling and Upselling seem to be difficult to implement," Telemarketing . Low, J. (2015, May 12 ). Super Sales Strategies: Quick Tips for Upselling And Cross-Selling. Retrieved March 24, 2016, from Business.com : http://www.business.com/ecommerce/quick-tips-for-upselling-and-cross-selling/ Paul R, P., Sheehan, M. J., & John I, C. (1997 ). The Journal of Business and Industrial Marketing . Robert C. Blattberg, B. -D. Database Marketing: (Analysing and Managing Customers) . Schiffman, S. (2005 ). Upselling Techniques (That really works!) . Adams Media. Wagner, K. A. (2008 ). Journal of Relationship Marketing: Cross-selling . Sales Selling techniques Personal selling