Whittaker, David J., author
Routledge, 1997
Buku Teks
Coyle, David Cushman, 1887-1969, author
Columbia University Press, 1963
Buku Teks
United Nations, 1950
Buku Teks
Stoessinger, John G., author
Brookings Institution, 1964
Buku Teks
United Nations
United Nations Department of Public Information, 2002
Buku Teks