Não informado. (1920). Contractors and engineers monthly. Buttenheim-Dix Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Contractors and Engineers Monthly. New York: Buttenheim-Dix Publishing, 1920.
Lua MLA (8ú heag.)Não informado. Contractors and Engineers Monthly. Buttenheim-Dix Publishing, 1920.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.