@book { PersonalmanagementimHandwerk,
    title = "Personalmanagement im Handwerk",
    author = "Julia Diana {Becker}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836645867",
    url = "https://m.diplom.de/document/227750"
}