@book { StreitfallSprachstandsdiagnostik,
    title = "Streitfall Sprachstandsdiagnostik",
    author = "Lydia {Lube}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836619622",
    url = "https://m.diplom.de/document/226161"
}