Wirtz,Jochen, & Lovelock,Christopher. (2022). Service Marketing: People, Technology & Strategy (9th.). World scientific.
Chicago-viite (17. p.)Wirtz,Jochen, ja Lovelock,Christopher. Service Marketing: People, Technology & Strategy. 9th. USA: World scientific, 2022.
MLA-viite (9. p.)Wirtz,Jochen, ja Lovelock,Christopher. Service Marketing: People, Technology & Strategy. 9th. World scientific, 2022.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.