Organisation for Economic Co-operation and Development. (2016). Improving issste's public procurement for better results. Organisation for Economic Co-operation and Development.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Organisation for Economic Co-operation and Development. Improving Issste's Public Procurement for Better Results. Paris, France: Organisation for Economic Co-operation and Development, 2016.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Organisation for Economic Co-operation and Development. Improving Issste's Public Procurement for Better Results. Organisation for Economic Co-operation and Development, 2016.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.