Barrett, Edward L.
Foundation Press, 1977
Buku Teks
Kauper, Paul G.
Little, Brown, 1966
Buku Teks
Gunther, Gerald
Foundation Press, 1970
Buku Teks
Allen, Michael F., editor
Blackstone Press Ltd., s.a.
Buku Teks
Gunther, Gerald
Foundation Press, 1973
Buku Teks