@book { BildungundErziehunginderDDR,
    title = "Bildung und Erziehung in der DDR",
    author = "Jana {Schröter}",
    year = "1998",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832410131",
    url = "https://m.diplom.de/document/216907"
}