Drucker, P. F. (1990). Managing the nonprofit organization: Principles and practices. New York: HarperCollins.
2.
Hatry, H. P., Blair, L. H., Fisk, D. M., Greiner, J. M., Hall, Jr., R., & Schaenman, P. S. (1992). How effective are your community services? Procedures for measuring their quality (revised ed.), Washington, DC: The Urban Institute/ICMA.
3.
Rossi, P. H. & Freeman, H. E. (1993). Evaluation: A systematic approach (5th ed.). Thousand Oaks, CA: Sage.
4.
United Way of America. (1996). Measuring program outcomes: A practical approach. Alexandria, VA: Author.