@book { PraktikumsberichtSchulpraktischeStudien1GymnasiumSPS1,
    title = "Praktikumsbericht Schulpraktische Studien 1 Gymnasium SPS 1 ",
    author = "Laura {Schmalenbach}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640894147",
    url = "https://www.hausarbeiten.de/document/134110"
}