"'You’re Either With Us or You’re With the Status Quo': Privatization Supporters Push Obama to Pick Their Kind of Education Secretary" by Dan Brown, www.huffingtonpost.com. January 6, 2009.
Interview in "Artforum" Magazine, November 1969; as quoted in "Six Years: The Dematerialization of the Art Object from 1966 to 1972" by Lucy R. Lippard, University of California Press, (p. 121), 1973.