@book { MethodenundWerkzeugeimQualittsmanagement,
    title = "Methoden und Werkzeuge im Qualitätsmanagement",
    author = "Martin {Drobits}",
    year = "2011",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783842811164",
    url = "https://m.diplom.de/document/228375"
}