Interfax: Russia & CIS oil & gas weekly. Interfax-America.
Lua i Stíl Chicago (17ú heag.)Interfax: Russia & CIS Oil & Gas Weekly. Aurora, Colorado: Interfax-America.
Lua MLA (9ú heag.)Interfax: Russia & CIS Oil & Gas Weekly. Interfax-America.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.