Barnett, M. L., Keating, N. L., Christakis, N. A., O’Malley, A. J., & Landon, B. E. (2011). Reasons for Choice of Referral Physician Among Primary Care and Specialist Physicians. Springer-Verlag.

Barnett, Michael L., Nancy L. Keating, Nicholas A. Christakis, A. James O’Malley, và Bruce E. Landon. Reasons for Choice of Referral Physician Among Primary Care and Specialist Physicians. Springer-Verlag, 2011.

Barnett, Michael L., et al. Reasons for Choice of Referral Physician Among Primary Care and Specialist Physicians. Springer-Verlag, 2011.