@book { ExternePersonalgewinnung,
    title = "Externe Personalgewinnung",
    author = "Sven {Lohberg}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832464530",
    url = "https://m.diplom.de/document/221876"
}