@book { 60JahreFriedensfahrtinOstmitteleuropa,
    title = "60 Jahre Friedensfahrt in Ostmitteleuropa",
    author = "Sandra {Holte}",
    year = "2008",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/226346"
}