Jeffrey H. Gitomer (1998). “Customer Satisfaction is Worthless, Customer Loyalty is Priceless: How to Make Customers Love You, Keep Them Coming Back and Tell Everyone They Know”, Bard
Asger Jorn, Per Hovdenakk, Stine Høholt, Arken museum for moderne kunst (Ishøj, Denmark), Cobra Museum voor Moderne Kunst (Amstelveen, Netherlands) (2002). “Asger Jorn”