Luard, Evan
St. Martin's Press, 1979
Buku Teks
New York University Press, 1950
Buku Teks
Bailey, Sydney D.
Marnes & Noble Books, 1995
Buku Teks
Stevenson, Adlai E., author
Harper & Row, 1961
Buku Teks
United Nations , [date of publication not identified]
Buku Teks