Não informado. (1978). McGraw-Hills Construction Contracting. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Não informado. McGraw-Hills Construction Contracting. New York: McGraw-Hill, 1978.
Lua MLA (8ú heag.)Não informado. McGraw-Hills Construction Contracting. McGraw-Hill, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.