Petrovich, B. (2015). The increasing hub pricing and market integration in EuropeThe increasing hub pricing and market integration in Europe. Oxford Institute for Energy Studies.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Petrovich, B. The Increasing Hub Pricing and Market Integration in EuropeThe Increasing Hub Pricing and Market Integration in Europe. Oxford Institute for Energy Studies, 2015.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Petrovich, B. The Increasing Hub Pricing and Market Integration in EuropeThe Increasing Hub Pricing and Market Integration in Europe. Oxford Institute for Energy Studies, 2015.
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