@book { MobbingamArbeitsplatz,
    title = "Mobbing am Arbeitsplatz",
    author = "Nicole {Busch}",
    year = "2007",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836605694",
    url = "https://m.diplom.de/document/229017"
}