@book { DieMetabolicDetoxKur,
    title = "Die Metabolic-Detox-Kur",
    subtitle = "Stoffwechsel gezielt anregen – für mehr Energie im Alltag. Die 30-Tage-Challenge",
    author = "Dipl.-Oec. Katrin {Kleinesper}",
    year = "2019",
    publisher = "humboldt",
    address = "Hannover, Deutschland",
    url = "https://schluetersche.openpublishing.com/document/451600"
}