Spencer, Charles. Blue Collar: An Internal Examination of the Workplace. Illinois: Lakeside Charter Books, 1977

Spencer, Charles. Blue Collar: An Internal Examination of the Workplace. Illinois: Lakeside Charter Books, 1977, Box: 2, Volume: 45. Midwest Distributors records, RH MS 949. University of Kansas. Kenneth Spencer Research Library. https://archives.lib.ku.edu/repositories/3/archival_objects/573974 Accessed March 09, 2026.