@book { WirtschaftlichesPrfungswesen,
    title = "Wirtschaftliches Prüfungswesen",
    author = "Gerrit {Brösel} and Christoph {Freichel} and Martin {Toll} and Robert {Buchner}",
    year = "2015",
    publisher = "Vahlen",
    address = "München, Deutschland",
    url = "https://vahlen.openpublishing.com/document/1220940"
}