Klein, Mitchell S.G., author
Prentice-Hall, 1984
Buku Teks
Horowitz, Donald L., author
The Brookings Institution, 1977
Buku Teks
Fersch, Ellsworth A.
Buku Teks
Hanbury, Harold Grenville, author
Oxford University Press, 1960
Buku Teks
Wright, Charles Alan, author
West Publishing, [1983, ]
Buku Referensi