@book { DerGeschenkeKnigge,
    title = "Der Geschenke-Knigge",
    author = "Franziska {von Au}",
    year = "2012",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    doi = "10.3239/9783955200657",
    url = "https://m.dotbooks.de/document/204523"
}