3. The working poor: invisible in America Shipler, David K., 1942- New York : Vintage Books, 2005. SOC358
4. Poverty in the United Kingdom: a survey of household resources and standards of living Townsend, Peter, 1928-2009. Berkeley : University of California Press, 1979. SOC358
5. The concept of poverty: working papers on methods of investigation and life-styles of the poor in different countries London : Heinemann, 1971. SOC358
