@book { DierichtigeErnhrungbeiLeakyGut,
    title = "Die richtige Ernährung bei Leaky Gut",
    author = "Dipl. Oec. Troph. Anne {Iburg}",
    year = "2023",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/1319885"
}