@book { QualittsmanagementsystemnachDINENISO90002000,
    title = "Qualitätsmanagementsystem nach DIN EN ISO 9000:2000",
    author = "Simone {Sauer}",
    year = "2002",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832459383",
    url = "https://m.diplom.de/document/221389"
}