Wirtz, J. Services Marketing: People, Technology, Strategy (9th.). World Scientific.
Chicago-referens (17:e uppl.)Wirtz, Jochen. Services Marketing: People, Technology, Strategy. 9th. World Scientific.
MLA-referens (9:e uppl.)Wirtz, Jochen. Services Marketing: People, Technology, Strategy. 9th. World Scientific.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.