Lewis, C. E., Hiatt, J. R., Wilkerson, L., Tillou, A., Parker, N. H., & Hines, O. J. (2011). Numerical Versus Pass/Fail Scoring on the USMLE: What Do Medical Students and Residents Want and Why? The Accreditation Council for Graduate Medical Education.

Lewis, Catherine E., Jonathan R. Hiatt, LuAnn Wilkerson, Areti Tillou, Neil H. Parker, και O. Joe Hines. Numerical Versus Pass/Fail Scoring On the USMLE: What Do Medical Students and Residents Want and Why? The Accreditation Council for Graduate Medical Education, 2011.

Lewis, Catherine E., et al. Numerical Versus Pass/Fail Scoring On the USMLE: What Do Medical Students and Residents Want and Why? The Accreditation Council for Graduate Medical Education, 2011.