Murphy, Jefrie G., author
D. Reidel Publishing Company, 1979
Buku Teks
edited by P.M.S. Hacker and J. Raz
Clarendon Press, 1988
Buku Teks
United Nations, 1996
Buku Teks
edited by Warren J. Samuels and A. Allan Schmid
Kluwer-Nijhoff, 1981
Buku Teks
Hook, Sidney, author
Southern Illinois University Press, 1980
Buku Teks