Udell, G. G. (1960). Naturalization laws, May 9, 1918-Sept. 22, 1959. Government Print. Off.
Lua i Stíl Chicago (17ú heag.)Udell, Gilman G. Naturalization Laws, May 9, 1918-Sept. 22, 1959. Washington: Government Print. Off, 1960.
Lua MLA (9ú heag.)Udell, Gilman G. Naturalization Laws, May 9, 1918-Sept. 22, 1959. Government Print. Off, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.