Hull
Hull, John M. The Contribution of Religious Education to Religious Freedom: A Global Perspective. https://www.iarf.net/REBooklet/Hull.htm, (tarkastettu 27.1.2022).
Hull, John M. The Contribution of Religious Education to Religious Freedom: A Global Perspective. https://www.iarf.net/REBooklet/Hull.htm, (tarkastettu 27.1.2022).