@book { StatistikfrWirtschaftswissenschaftler,
    title = "Statistik für Wirtschaftswissenschaftler",
    author = "Josef {Bleymüller} and Rafael {Weißbach} and Achim {Dörre}",
    year = "2020",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1221355"
}