Castaneda, Jorge, author
Secretaria De Relaciones Exteriores, 2002
Buku Teks
United Nations, 1983
Buku Teks
Attard, David Joseph, author
Clarendon Press, 1987
Buku Teks
edited by Lewis M. Alexander
University of Rhode Island, 1971
Buku Teks
Extavour, Winston Concrad
Sijthoff, 1981
Buku Teks