@book { PlanungderUnternehmensziele,
    title = "Planung der Unternehmensziele",
    author = "Antina {Butschke}",
    year = "2001",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832437596",
    url = "https://m.diplom.de/document/219442"
}