Bilen, O. (1986). Improved efficiency in the management and mobilization of financial resources for water sector development projects. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bilen, Ozden. Improved Efficiency in the Management and Mobilization of Financial Resources for Water Sector Development Projects. New York: United Nations, 1986.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Bilen, Ozden. Improved Efficiency in the Management and Mobilization of Financial Resources for Water Sector Development Projects. United Nations, 1986.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.