OPEC Fund for International Development, Organization of Petroleum Exporting Countries, & McKechnie, A. (2004). Making a difference: The OPEC Fund and the fight against poverty. Bi-Ti-Ex Worldwide Ltd..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)OPEC Fund for International Development, Organization of Petroleum Exporting Countries, و Allison McKechnie. Making a Difference: The OPEC Fund and the Fight Against Poverty. London: Bi-Ti-Ex Worldwide Ltd., 2004.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)OPEC Fund for International Development, et al. Making a Difference: The OPEC Fund and the Fight Against Poverty. Bi-Ti-Ex Worldwide Ltd., 2004.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.