Crocker, Walter R. (Walter Russell), 1902-, author
Melbourne University Press, 1971
Buku Teks
Friedmann, Wolfgang, 1907-1972, author
Macmillan, 1951
Buku Teks
Schelling, Thomas C., author
The Twentieth Century Fund, 1961
Buku Teks
Osgood, Robert Endicott, author
The University Chicago Press, 1962
Buku Teks
edited and with Introductions by Paul E. Sigmund
Frederick A. Praeger, 1967
Buku Teks