@book { OutsourcingderbetrieblichenPersonalentwicklung,
    title = "Outsourcing der betrieblichen Personalentwicklung",
    author = "Karsten {Jacke}",
    year = "1997",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832404437",
    url = "https://m.diplom.de/document/216411"
}