Citazione Stile APA (7a Edizione)
Timm, P. R. (2002). 50 powerful ideas you can use to keep your customers (3rd ed.). Career Press.
Citazione stile Chigago Style (17a edizione)
Timm, Paul R. 50 Powerful Ideas You Can Use to Keep Your Customers. 3rd ed. Franklin Lakes, NJ: Career Press, 2002.
Citatione MLA (9a ed.)
Timm, Paul R. 50 Powerful Ideas You Can Use to Keep Your Customers. 3rd ed. Career Press, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.