@book { StrategischesPersonalcontrolling,
    title = "Strategisches Personalcontrolling",
    author = "Max {Krall}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842821743",
    url = "https://m.diplom.de/document/228307"
}