Keefe, W. J. (1984). Congress and the American people. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Keefe, William J. Congress and the American People. Prentice-Hall, 1984.
Lua MLA (8ú heag.)Keefe, William J. Congress and the American People. Prentice-Hall, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.