1. (1975). Health care politics: Ideological and interest group barriers to reform. Chicago: The University of Chicago Press.
2. (1970). Roles in technical communication networks. In & (Eds.), Communication among scientists and engineers (pp. 191-208). Lexington, MA: Heath Lexington Books.
3. American Association of Public Opinion Research. (1999). Best practices for survey and public opinion research. Ann Arbor, MI: Author. Retrieved October 5, 2000 from the World Wide Web: http://www.aapor.org/ethics/best.html#best11.