Hamilton, Robert W., author
West Publishing, 1990
Buku Teks
Vagts, Detlev F., author
The Foundation Press, INC, 1973
Buku Teks
Craig, Robin Kundis
Thomson/West, 2008
Buku Teks
Maguire, John MacArthur
Foundation Press,, 1978
Buku Teks
Rose, Jerome G.
The State University of New Jersey, 1974
Buku Teks