Bickman, Leonard, and Michele Athay. "The Worst of all Possible Program Evaluation Outcomes." The Field Research Survival Guide. : Oxford University Press, 2009-04-30. Oxford Scholarship Online. 2010-04-01. Date Accessed 19 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195325522.001.0001/acprof-9780195325522-chapter-9>.
Bickman, L., & Athay, M.(2009-04-30). The Worst of all Possible Program Evaluation Outcomes. In The Field Research Survival Guide. : Oxford University Press. Retrieved 19 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195325522.001.0001/acprof-9780195325522-chapter-9.
Bickman, Leonard, and Michele Athay. "The Worst of all Possible Program Evaluation Outcomes." In The Field Research Survival Guide. : Oxford University Press, 2009-04-30. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195325522.001.0001/acprof-9780195325522-chapter-9.
Bickman L, Athay M. The Worst of all Possible Program Evaluation Outcomes. In: Stiffman AR. The Field Research Survival Guide. Oxford University Press; 2009. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780195325522.001.0001/acprof-9780195325522-chapter-9. Accessed May 19, 2013.