4Bagnoli, L. , & Megali, C. Measuring Performance in Social Enterprises. Nonprofit & Voluntary Sector Quarter- ly, 2011,40(1). 149 - 165.
5Benjamin, L. M. Nonprofit Organizations and Out- come Measurement: From Tracking Program Activities to Focusing on Frontline Work. American Journal Of Evalu- ation, 2012,33(3) :431 -447.
6Liket, K. C. , Rey- Garcia, M. , & Maas, K. H. Why Aren't Evaluations Working and What to Do About It: A Framework for Negotiating Meaningful Evaluation in Nonprofits. American Journal Of Evaluation, 2014,35 (2) :171 -188.