Lua APA (7ú heag.)
Tordo, S., Tracy, B. S., & Arfaa, N. (2011). National oil companies and value creation. World Bank.
Lua i Stíl Chicago (17ú heag.)
Tordo, Silvana, Brandon S. Tracy, agus Noora Arfaa. National Oil Companies and Value Creation. Washington, D.C.: World Bank, 2011.
Lua MLA (9ú heag.)
Tordo, Silvana, et al. National Oil Companies and Value Creation. World Bank, 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.