Não informado. (1973). Hydrogen Energy. University of New Mexico, Technology Application Center.
Lua i Stíl Chicago (17ú heag.)Não informado. Hydrogen Energy. Albuquerque, México: University of New Mexico, Technology Application Center, 1973.
Lua MLA (8ú heag.)Não informado. Hydrogen Energy. University of New Mexico, Technology Application Center, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.