* Hugo S. Cunningham, [http://www.cyberussr.com/rus/dreiser.html Theodore Dreiser (1871-1945): His Friendship to the Soviet People in 1938-1941], CyberUSSR.com, 1999
* Hugo S. Cunningham, [http://www.cyberussr.com/rus/dreiser.html Theodore Dreiser (1871-1945): His Friendship to the Soviet People in 1938-1941], CyberUSSR.com, 1999