@book { MarketingRechtsManagement,
    title = "Marketing - Rechts - Management",
    author = "Guido {Möllering}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832426163",
    url = "https://m.diplom.de/document/218401"
}