Stern, J. (2015). Gazprom: A long march to market-based pricing in Europe? Oxford Institute for Energy Studies.
Lua i Stíl Chicago (17ú heag.)Stern, J. Gazprom: A Long March to Market-based Pricing in Europe? Oxford Institute for Energy Studies, 2015.
Lua MLA (9ú heag.)Stern, J. Gazprom: A Long March to Market-based Pricing in Europe? Oxford Institute for Energy Studies, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.