Gordon, Scott
Columbia University Press, 1980
Buku Teks SO
Guyer, Paul
Cambridge University Press, 2000
Buku Teks
edited by Charles J. White and Norman Gross
American Bar Association , 1985
Buku Teks SO
edited by Herbert Morris
Stanford University Press, 1961
Buku Teks SO
edited by Ronald St. John Macdonald, Douglas M. Johnston and Gerald L. Morris
Sijthoff & Noordhoff, 1978
Buku Teks SO