Virag, A. (2013). Transition in the European refining sector: Strategies to meet present and future industry challenges from a Central European perspective. Oxford Institute for Energy Studies.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Virag, A. Transition in the European Refining Sector: Strategies to Meet Present and Future Industry Challenges from a Central European Perspective. Oxford Institute for Energy Studies, 2013.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Virag, A. Transition in the European Refining Sector: Strategies to Meet Present and Future Industry Challenges from a Central European Perspective. Oxford Institute for Energy Studies, 2013.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.