B. Axelrod, J. Barth, D. Faust, J. Fisher, R. Heilbronner, G. Larrabee, N. Pliskin, C. Silver,
Presence of third party observers during neuropsychological testing: Official statement of the National Academy of Neuropsychology Archives of Clinical Neuropsychology. ,vol. 15, pp. 379- 380 ,(2000) ,
10.1093/ARCLIN/15.5.379