Não informado. (1984). API Abstracts. American Petroleum Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. API Abstracts. New York: American Petroleum Institute, 1984.
Lua MLA (8ú heag.)Não informado. API Abstracts. American Petroleum Institute, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.