Kayal, A., & unknown. (1997). Using a new patent based technology indicator to measure the paceof technological progress for superconductor and semiconductortechnologies.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kayal, A., و unknown. Using a New Patent Based Technology Indicator to Measure the Paceof Technological Progress for Superconductor and Semiconductortechnologies. 1997.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Kayal, A., و unknown. Using a New Patent Based Technology Indicator to Measure the Paceof Technological Progress for Superconductor and Semiconductortechnologies. 1997.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.