@book { SommersternenhimmelDreiRomaneineinemeBook,
    title = "Sommersternenhimmel: Drei Romane in einem eBook",
    author = "Jennifer {Wellen} and Lena {Sand} and Jeanette {Sanders}",
    year = "2020",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://m.dotbooks.de/document/539305"
}