1. What is public affairs?;Armstrong,1982
2. Lobbying and policy change: Who wins, who loses and why;Baumgartner,2009
3. Basic interests: The importance of groups in politics and in political science;Baumgartner,1998
4. The process of government;Bentley,1908
5. The political role and influence of business organizations: A communication perspective;Berger,2002