Barker, E. (1915) The Discredited state, Political Quarterly, No.5.
Truman, D. (1951), The Governmental Prosses, Newyork: Alfred A. Knopf. p 10
James.Gordely (1995) tort law in the Aristotelian Tradition. IN philosophical Foundations of tort lawUEdition by David G.Owen.Clarendeon press.oxford.first published.
Carol Harlow (1955) Discrationary power and governmental liability .Oxford (UK)council of Europe publishing For Qualitative Research Chicago, Aldine Publishing Company.
Glaser, B,G. & Strauss, L. (2008), The Discovery Of Grounded Theory: Strategies