@book { FranchisingDaspraktischeBeispielderVapianoAG,
    title = "Franchising. Das praktische Beispiel der Vapiano AG",
    author = "Denise {Hobrack}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640903047",
    url = "https://www.hausarbeiten.de/document/171094"
}