@book { Arbeitnehmerberlassung,
    title = "Arbeitnehmerüberlassung",
    author = "Lisa {Frensch}",
    year = "2005",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832486273",
    url = "https://m.diplom.de/document/223821"
}