@book { Ganzheitlichaktivieren3Naturerleben,
    title = "Ganzheitlich aktivieren 3, Natur erleben",
    author = "Birgit {Henze}",
    year = "2019",
    publisher = "Schlütersche Verlagsgesellschaft mbH & Co. KG",
    address = ", Deutschland",
    url = "https://schluetersche.openpublishing.com/document/461826"
}