@book { DergroeHochzeitsratgeber,
    title = "Der große Hochzeitsratgeber",
    author = "Friederike {Mauritz} and Nikola {Stiefelhagen}",
    year = "2013",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/403139"
}