International Institute for Applied Systems Analysis & OPEC Fund for International Development. (2009). Biofuels and food security: Implications of an accelerated biofuels production. OFID.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)International Institute for Applied Systems Analysis و OPEC Fund for International Development. Biofuels and Food Security: Implications of an Accelerated Biofuels Production. Vienna: OFID, 2009.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)International Institute for Applied Systems Analysis و OPEC Fund for International Development. Biofuels and Food Security: Implications of an Accelerated Biofuels Production. OFID, 2009.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.