Wirtz,Jochen, & Lovelock,Christopher. (2022). Service Marketing: People, Technology & Strategy (9th.). World scientific.
Lua i Stíl Chicago (17ú heag.)Wirtz,Jochen, agus Lovelock,Christopher. Service Marketing: People, Technology & Strategy. 9th. USA: World scientific, 2022.
Lua MLA (9ú heag.)Wirtz,Jochen, agus Lovelock,Christopher. Service Marketing: People, Technology & Strategy. 9th. World scientific, 2022.
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