@book { BallettmitBestie,
    title = "Ballett mit Bestie",
    subtitle = "Literatur-Quickie - Band 71",
    author = "Isabella {Straub}",
    year = "2015",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/288729"
}