@book { KrioGeschichteundAnalyseanhandvonTexten,
    title = "Krio: Geschichte und Analyse anhand von Texten",
    author = "Sina {Friedreich}",
    year = "2003",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/222458"
}