@book { DasPhnomendesneuenDienstmdchens,
    title = "Das Phänomen des neuen Dienstmädchens",
    author = "Petra {Tengs}",
    year = "2006",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    url = "https://m.diplom.de/document/224793"
}