Beck, A., Crain, A. L., Solberg, L. I., Unützer, J., Glasgow, R. E., Maciosek, M. V., & Whitebird, R. (2011). Severity of Depression and Magnitude of Productivity Loss. American Academy of Family Physicians.

Beck, Arne, A. Lauren Crain, Leif I. Solberg, Jürgen Unützer, Russell E. Glasgow, Michael V. Maciosek, and Robin Whitebird. Severity of Depression and Magnitude of Productivity Loss. American Academy of Family Physicians, 2011.

Beck, Arne, et al. Severity of Depression and Magnitude of Productivity Loss. American Academy of Family Physicians, 2011.