Ashrafi, A. (2011). Efficiency Measurement of Decision Making Units with Series and Parallel Structures by Data Envelopment Analysis.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ashrafi, Ali. Efficiency Measurement of Decision Making Units with Series and Parallel Structures by Data Envelopment Analysis. 2011.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ashrafi, Ali. Efficiency Measurement of Decision Making Units with Series and Parallel Structures by Data Envelopment Analysis. 2011.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.