@book { AnleitungzurKindererziehung,
    title = "Anleitung zur Kindererziehung",
    author = "Karl {Bekker}",
    year = "2016",
    publisher = "Uksak E-Books",
    address = "Lengerich, Deutschland",
    url = "https://uksakebooks.grin.com/document/323694"
}