@book { MaterialgruppenmanagementDieLsungfrdasProblemderEinkaufsorganisation,
    title = "Materialgruppenmanagement: Die Lösung für das Problem der Einkaufsorganisation?",
    author = "Katja {Seifert}",
    year = "2013",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296630"
}