Goldstein, K. M. (1999). Interest groups, lobbying, and participation in America. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Goldstein, Kenneth M. Interest Groups, Lobbying, and Participation in America. Cambridge ; New York: Cambridge University Press, 1999.
Lua MLA (8ú heag.)Goldstein, Kenneth M. Interest Groups, Lobbying, and Participation in America. Cambridge University Press, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.