@book { BerufsvorbereitunginderSchule,
    title = "Berufsvorbereitung in der Schule",
    author = "Marco {Baumgarten}",
    year = "2013",
    publisher = "BACHELOR + MASTER PUBLISHING",
    address = "Hamburg, Deutschland",
    url = "https://m.bachelor-master-publishing.de/document/296751"
}