@book { FeedbackgesprcheinderHotellerie,
    title = "Feedbackgespräche in der Hotellerie",
    author = "Ines {Thurau}",
    year = "2010",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783836649407",
    url = "https://m.diplom.de/document/227895"
}