Ministry of Foreign Affair, 1971
Buku Teks
Goodrich, Leland M., author
Thomas Y. Crowell, 1961
Buku Teks
Coyle, David Cushman, 1887-1969, author
Columbia University Press, 1963
Buku Teks
by United Nations
United Nations, [Date of publication not identified]
Buku Teks
United Nations
United Nations Department of Public Information, 2002
Buku Teks