Willis, W. R. (1979). 200 years and still counting: Past, present and future of the sunday school. Victor Books.
Chicago-Zitierstil (17. Ausg.)Willis, Wesley R. 200 Years and Still Counting: Past, Present and Future of the Sunday School. Illinois: Victor Books, 1979.
MLA-Zitierstil (9. Ausg.)Willis, Wesley R. 200 Years and Still Counting: Past, Present and Future of the Sunday School. Victor Books, 1979.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.