edited by Louis Henkin
Spectrum, 1961
Buku Teks
Henkin, Louis, author
Columbia University Press, 1958
Buku Teks
Edward, David V., author
Holt, Rinehart and Winston, 1969
Buku Teks
Bechhoefer, Bernhard G., author
Brookings Institution, 1961
Buku Teks
Millis, Walter
Atheneum, 1965
Buku Teks