@book { QualittsmanagementimFitnessstudioEinfhrungderISO90012000Norm,
    title = "Qualitätsmanagement im Fitnessstudio: Einführung der ISO 9001:2000 Norm",
    author = "Manuel {Seybold}",
    year = "2011",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296439"
}