@book { MobbingamArbeitsplatz,
    title = "Mobbing am Arbeitsplatz",
    author = "Jens {Dell´Anna}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640892877",
    url = "https://www.hausarbeiten.de/document/170445"
}