@book { DiereligiseErziehungnachFriedrichSchleiermacher,
    title = "Die religiöse Erziehung nach Friedrich Schleiermacher",
    author = "Johannes {Keller}",
    year = "2011",
    publisher = "GRIN Verlag",
    address = "München, Germany",
    doi = "10.3239/9783640984459",
    url = "https://www.hausarbeiten.de/document/177012"
}