Não informado. (1961). Hidrocarbon Processing and Petroleum Refiner. Gulf Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Hidrocarbon Processing and Petroleum Refiner. Houston, Tex: Gulf Publishing, 1961.
Lua MLA (8ú heag.)Não informado. Hidrocarbon Processing and Petroleum Refiner. Gulf Publishing, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.