Não informado. (1971). Concrete abstracts. American Concrete Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Concrete Abstracts. Detroit, Mich: American Concrete Institute, 1971.
Lua MLA (8ú heag.)Não informado. Concrete Abstracts. American Concrete Institute, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.