Burton, Steven J.
West Publishing Co., 1995
Buku Teks SO
compiled and edited by Harold Shepherd and Byron D. Sher
Foundation Press, 1960
Buku Teks
Craswell, Richard
Oxford University Press, 1994
Buku Teks
Scott, Robert E.
Michie, 1988
Buku Teks SO
Fuller, Lon L.
West Publishing, 1964
Buku Teks SO