Stephen K. Sagarin, Promise and compromise: A history of Waldorf schools in the United States, 1928--1998, Ph. D. thesis, Columbia University, 2004. AbstractArkivigite je 2007-10-22 per la retarkivo Wayback Machine
P. Bruce Uhrmacher, "Uncommon Schooling: A Historical Look at Rudolf Steiner, Anthroposophy and Waldorf Education", Curriculum Inquiry, Vol. 25, No. 4. Winter 1995. Abstract
Stephen K. Sagarin, Promise and compromise: A history of Waldorf schools in the United States, 1928--1998, Ph. D. thesis, Columbia University, 2004. AbstractArkivigite je 2007-10-22 per la retarkivo Wayback Machine