- McCroskey , James C. and Dunham , Robert E. 1966 . “Ethos: A Confounding Element in Communication Research,” . SM , XXXIII November : 456 – 463 .
- Holtzman , Paul D. 1966 . “Confirmation of Ethos as a Confounding Element in Communication Research,” . XXXIII November : 464 – 466 . ibid.,
- Berlo , David and Gulley , Halbert . 1957 . “Some Determinants of the Effect of Oral Communication in Producing Attitude Change and Learning,” . XXIV March : 10 – 20 . ibid.,
- Andersen , Kenneth and Clevenger , Theodore Jr. 1963 . “A Summary of Experimental Research in Ethos,” . XXX June : 68 ibid.,
- Tompkins , Phillip K. and Samovar , Larry A. 1964 . “An Experimental Study of the Effects of Credibility on the Comprehension of Content,” . SM , XXXI June : 120 – 123 .
Speech Monographs
Volume 34, 1967 - Issue 2