@book { MitWitzCharmeundPointe,
    title = "Mit Witz, Charme und Pointe",
    author = "Petra {Harm}",
    year = "2000",
    publisher = "Diplom.de",
    address = "Hamburg, Deutschland",
    doi = "10.3239/9783832427597",
    url = "https://m.diplom.de/document/218493"
}