A. J. Muste's statement of 1941, as quoted in Howard Zinn "A People's History" (p. 416), 1980, and later quoted in Howard Zinn "The Twentieth Century: A People's History" (p. 159), May 9, 1984.
"Some Notes on Workers' Education" by A. J. Muste, first published in "New International", Volume 2, No. 7 (pp. 225-227), www.marxists.org. December 1935.