@book { WiderstandimNationalsozialismusunterrichten,
    title = "Widerstand im Nationalsozialismus unterrichten",
    author = "Robert {Pilgrim}",
    year = "2009",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640448708",
    url = "https://www.hausarbeiten.de/document/136700"
}