Kaufman, R. (2012). Uplifting service: The proven path to delighting your customers, colleagues, and everyone else you meet (NA.). Evolve Publishing.
Chicago-viite (17. p.)Kaufman, Ron. Uplifting Service: The Proven Path to Delighting Your Customers, Colleagues, and Everyone Else You Meet. NA. USA: Evolve Publishing, 2012.
MLA-viite (9. p.)Kaufman, Ron. Uplifting Service: The Proven Path to Delighting Your Customers, Colleagues, and Everyone Else You Meet. NA. Evolve Publishing, 2012.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.