Luard, Evan
St. Martin's Press, 1979
Buku Teks
Coyle, David Cushman, 1887-1969, author
Columbia University Press, 1963
Buku Teks
Goodrich, Leland M., author
Thomas Y. Crowell, 1961
Buku Teks
United Nations Department of Public Information, 1989
Buku Teks
Department of Republic Information United Nations, 1992
Buku Teks