Gottstein, K. (1979). Brief descriptions of nongovernmental institutions in the Federal Republic of Germany co-operating with developing countries in science and technology: Issued on the occasion of the UN Conference on Science and Technology for Development, Vienna, 21-30 August 1979. nstitut fu"r wissenschaftliche Zusammenarbeit mit Entwicklungsla"ndern.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Gottstein, K. Brief Descriptions of Nongovernmental Institutions in the Federal Republic of Germany Co-operating with Developing Countries in Science and Technology: Issued on the Occasion of the UN Conference on Science and Technology for Development, Vienna, 21-30 August 1979. Tu"bingen: nstitut fu"r wissenschaftliche Zusammenarbeit mit Entwicklungsla"ndern, 1979.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Gottstein, K. Brief Descriptions of Nongovernmental Institutions in the Federal Republic of Germany Co-operating with Developing Countries in Science and Technology: Issued on the Occasion of the UN Conference on Science and Technology for Development, Vienna, 21-30 August 1979. nstitut fu"r wissenschaftliche Zusammenarbeit mit Entwicklungsla"ndern, 1979.