@book { DieBetriebsstttengewinnermittlung,
    title = "Die Betriebsstättengewinnermittlung",
    author = "Isabell {Adenacker}",
    year = "2015",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/311549"
}