@book { EinMannmachtnochkeinenSommer,
    title = "Ein Mann macht noch keinen Sommer",
    subtitle = "Roman",
    author = "Lena {Sand}",
    year = "2018",
    publisher = "dotbooks Verlag",
    address = "München, Deutschland",
    url = "https://www.dotbooks.de/document/438844"
}