• Pius Hostetler:
The Life, Preaching, and Labors of John D. Kauffman, Shelbyville, Illinois, 1915. • Jacob Christner: ''Kauffman's Sermons'', Tampico, Illinois: Tornado Print, no date, 24 pages. (First edition, 1915; second edition, 1948). • Jacob Christner:
Predigten von Johannis D. Kauffman, Burnsville, N.C., 1959. • Harry H. Hiller:
The Sleeping Preacher: An Historical Study of the Role of Charisma in Amish Society in Pennsylvania Folklife 18 (Winter 1968/69), pages 19–31. • Phoebe A. Brubaker:
Possession Trance and Plain Coats : The Lives, Times, and Trances of Amish Mennonite "Sleeping" Preachers Noah Troyer and John D. Kauffman, 1878-1920, manuscript at
Goshen College, History Senior Seminar, 2003. == References ==