1. H.L.A. Hart, The Concept of Law, 2nd ed. with a postscript ed. by Penelope A. Bulloch & Joseph Raz (1994), 110, 116, 193.

2. Robert W. Gordon, "Critical Legal Histories," 36 Stan. L. Rev. 57, 60-61 (1984)

3. Law & Society: Readings in the Social Study of Law, eds. Stewart Macaulay, Lawrence M. Friedman, John Stookey (1995), 1-6.