@book { QualittszirkelimKontextdesTotalQualityManagement,
    title = "Qualitätszirkel im Kontext des Total Quality Management",
    author = "Stephan {Lüdtke}",
    year = "2004",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638324656",
    url = "https://www.hausarbeiten.de/document/31462"
}