United Nation Coference on Application of Science & Technology. Communications: sceince and technology, and development: United Nations conference on the application of science and tecnology for the benefit of less developed areas. United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)United Nation Coference on Application of Science & Technology. Communications: Sceince and Technology, and Development: United Nations Conference on the Application of Science and Tecnology for the Benefit of Less Developed Areas. New Jessey: United Nations.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)United Nation Coference on Application of Science & Technology. Communications: Sceince and Technology, and Development: United Nations Conference on the Application of Science and Tecnology for the Benefit of Less Developed Areas. United Nations.