Não informado. (1954). API abstracts of refining literature. American Petroleum Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. API Abstracts of Refining Literature. New York: American Petroleum Institute, 1954.
Lua MLA (8ú heag.)Não informado. API Abstracts of Refining Literature. American Petroleum Institute, 1954.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.