@book { IntegrativePdagogikunddieKulturhistorischeTheorie,
    title = "Integrative Pädagogik und die Kulturhistorische Theorie",
    author = "Birger {Siebert}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1106374"
}