United Nations. (1970). Agriculture: Science, technology and development : United States papers prepared for the United Nations conference on the application of science and technology for the benefit of the less developed areas. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nations. Agriculture: Science, Technology and Development : United States Papers Prepared for the United Nations Conference on the Application of Science and Technology for the Benefit of the Less Developed Areas. Geneva: United Nations, 1970.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United Nations. Agriculture: Science, Technology and Development : United States Papers Prepared for the United Nations Conference on the Application of Science and Technology for the Benefit of the Less Developed Areas. United Nations, 1970.