United Nations Conference on Trade and Development. (1970). The measurement of development effort: Study. New York: United Nations.
استشهاد بنمط شيكاغوUnited Nations Conference on Trade and Development. The Measurement of Development Effort: Study. New York: United Nations, 1970.
MLA استشهادUnited Nations Conference on Trade and Development. The Measurement of Development Effort: Study. New York: United Nations, 1970.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.