@book { DieWirtschaftsWeltstehtKopf,
    title = "Die Wirtschafts-Welt steht Kopf",
    author = "Norbert {Berthold} and Jörn {Quitzau}",
    year = "2023",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1361960"
}