Wirtz, J. Services Marketing: People, Technology, Strategy (9th.). World Scientific.
Citazione stile Chigago Style (17a edizione)Wirtz, Jochen. Services Marketing: People, Technology, Strategy. 9th. World Scientific.
Citatione MLA (9a ed.)Wirtz, Jochen. Services Marketing: People, Technology, Strategy. 9th. World Scientific.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.