references
- Berelson , B. , Lazarsfeld , P. F. and McPhee , W. N. 1954 . Voting Change , Chicago : Univ. Chicago Press .
- McGrath , J. E. and McGrath , M. F. 1962 . Effects of partisanship on perceptions of political figures . Publ. Opin. Quart. , 26 : 236 – 248 .