(1983). The American democracy institutions, Politics. The Dorsey Press.
Lua i Stíl Chicago (17ú heag.)The American Democracy Institutions, Politics. The Dorsey Press, 1983.
Lua MLA (8ú heag.)The American Democracy Institutions, Politics. The Dorsey Press, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.