Footnotes
- Doob , Leonard W. 1948 . Public Opinion and Propaganda , 246 N. Y. : Henry Holt and Company .
- Lasswell , Harold D. , Casey , Ralph D. and Smith , Bruce L. 1935 . Propaganda and Promotional Activities , 4 Minneapolis : U. of Minn. Press .
- Hovland , Carl I. , Lumsdane , Arthur A. and Sheffield , Fred D. 1949 . Experiments on Mass Communication , Vol. III , 265 – 277 . Princeton : Princeton U. Press .
- Ewbank , Henry L. and Auer , Jeffrey J. 1951 . Discussion and Debate , 240 N. Y. : Appleton Century Crofts .