Wilson, R. G. (2003). A Guide to Popular U.S. landmarks. Franklin Watts.
Lua i Stíl Chicago (17ú heag.)Wilson, Richard Guy. A Guide to Popular U.S. Landmarks. Franklin Watts, 2003.
Lua MLA (8ú heag.)Wilson, Richard Guy. A Guide to Popular U.S. Landmarks. Franklin Watts, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.