Reisman, W. Michael (William Michael), 1939-, author
Yale University Press, 1971
Buku Teks
Lakos, Amos, author
Westview Press, 1989
Buku Referensi
Merrills, J.G., author
Cambridge University Press, 1995
Buku Teks
Merrills, J.G., author
Sweet and Maxwell, 1984
Buku Teks
Tacsan, Joaquin, author
Martinus Nijhoff, 1992
Buku Teks