Welch, J. N. (1956). The Constitution. Houghton Mifflin.
Lua i Stíl Chicago (17ú heag.)Welch, Joseph N. The Constitution. Boston: Houghton Mifflin, 1956.
Lua MLA (8ú heag.)Welch, Joseph N. The Constitution. Houghton Mifflin, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.