Grace Lee Boggs, Scott Kurashige, Danny Glover (2012). “The Next American Revolution: Sustainable Activism for the Twenty-First Century”, p.47, Univ of California Press
"Student Riots", editorial in "The Emporia (Kansas) Gazette" (April 8, 1932); reported in "Forty Years on Main Street" compiled by Russell H. Fitzgibbon, (p. 331), 1937.