@book { DasTrauerTagebuch,
    title = "Das Trauer-Tagebuch",
    subtitle = "Dein Begleiter zur Trauerbewältigung",
    author = "Kerstin {Leyendecker}",
    year = "2022",
    publisher = "Omnino Verlag",
    address = "Berlin, Deutschland",
    url = "https://shop.omnino-verlag.de/document/1147847"
}