@book { Das4CIDModellamBeispiel,
    title = "Das 4CID-Modell am Beispiel ",
    author = "Timo {Nause}",
    year = "2008",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640224227",
    url = "https://www.hausarbeiten.de/document/118786"
}