1. Adler, P., & Tilly, C. (2014). The State of the Unions in 2014: a profile of union membership in Greater Los Angeles, San Francisco, California, and the Nation. UCLA: Institute for Research on Labor and Employment Available at http://www.irle.ucla.edu/publications/documents/TheStateoftheUnions2014PA1.pdf .Accessed 2 Sep 2014
2. American Psychiatric Association (2000). Diagnostic and Statistical Manual of Mental Disorders, IV, Text Revision (DSM IV-TR). Washington, D.C.: American Psychiatric Association.
3. Banks, A. (1991/1992). The Power and Promise of Community Unionism. Labor Research Review, 1(18), 17–32.
4. Block, J. (1961). The Q-Sort Method in Personality Assessment and Psychiatric Research [Electronic version]. Springfield, IL: Charles C Thomas.
5. Bronfenbrenner, K. (2009). No holds barred: the Intensification of Employer Opposition to Organizing (1–2). Briefing Paper #235, Economic Policy Institute. http://www.americanrightsatwork.org/dmdocuments/ ARAWReports/noholdsbarred.pdf. Accessed 1 Jan 2013.