@book { DasLiedunseresSommers,
    title = "Das Lied unseres Sommers",
    subtitle = "Roman | Vier Frauen, vier Jahrzehnte – eine bewegende Freundinnen-Saga",
    author = "Penelope {Stokes} and Heidi {Lichtblau}",
    year = "2020",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/590641"
}