- Roskelly , R. W. 1938 . “Attitudes and Overt Behavior.” . The University of Wisconsin . PhD. Thesis
- Zimmerman , C. C. 1927 . “Types of Farmer's .Attitudes.” . Social Forces , V : 591 – 596 .
- Likert , R. 1932 . “A Technique for the Measurement of Attitudes.” . Archives of Psychology ,
- Knower , F. N. 1934 . “Experimental Studies in Changes in Attitudes. Some Incidence of Attitude Changes,” . Journal of Applied Psychology , XX : 114 – 127 .
- Jenness , A. 1933 . “The Role of Discussion in Changing Opinion Regarding a Matter of Fact,” . Journal of Abnormal and Social Psychology , XXX : 279 – 296 .
- Lull , P. E. 1939 . “An Objective Study of the Effectiveness of Humor in Persuasive Speeches,” . The University of Wisconsin . Ph.D. Thesis.
Speech Monographs
Volume 7, 1940 - Issue 1