Fried. (2008). The measurement of productive efficiency and productivity change. Oxford.
استشهاد بنمط شيكاغوFried. The Measurement of Productive Efficiency and Productivity Change. Oxford, 2008.
MLA استشهادFried. The Measurement of Productive Efficiency and Productivity Change. Oxford, 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.