Chiba J-PAC Chiba University 1998,
Buku Teks
Berlin, Isaiah
Viking Press, 1981
Buku Teks
Foenander, Orwell De R., author
The Law Book Co.Of Australia, 1954
Buku Teks
Knight, Frank Hyneman
New York, N.Y. Augustus M. Kelley Inc 1951,
Buku Teks
Mitchell, Wesley C., author
Augustus M. Kelly, 1950
Buku Teks