@book { AllgemeinesSchulpraktikumaneinerHauptschule,
    title = "Allgemeines Schulpraktikum an einer Hauptschule ",
    author = "Gunnar {Norda}",
    year = "2005",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783638430647",
    url = "https://www.hausarbeiten.de/document/45708"
}