@book { SchlerleistungimSpiegelderPisaStudie,
    title = "Schülerleistung im Spiegel der Pisa-Studie",
    author = "Verena {Jannemann}",
    year = "2003",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638167413",
    url = "https://www.hausarbeiten.de/document/10264"
}