Hay, Peter, author
West Publishing, 1994
Buku Teks
Scoles, Eugene F., author
West Publishing, 1992
Buku Teks
edited by J.H.C. Morris
[Publisher not identified], 1973
Buku Teks
Mayss, Abla J., author
Cavendish, 1994
Buku Teks
Ehrenzweig, Albert A., author
West Publishing, 1959
Buku Teks