@book { KompetenzmessunganBerufsschulen,
    title = "Kompetenzmessung an Berufsschulen",
    author = "Felix {Frohneberg}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640506460",
    url = "https://www.hausarbeiten.de/document/141393"
}