Kollman, K. (1998). Outside lobbying: Public opinion and interest group strategies. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Kollman, Ken. Outside Lobbying: Public Opinion and Interest Group Strategies. Princeton, N.J.: Princeton University Press, 1998.
Lua MLA (8ú heag.)Kollman, Ken. Outside Lobbying: Public Opinion and Interest Group Strategies. Princeton University Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.