Nahin, R. L., Barnes, P. M., & Stussman, B. J. (2016). Expenditures on complementary health approaches: United States, 2012. Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics.

Nahin, Richard L.,, Patricia M. Barnes, and Barbara J. Stussman. Expenditures On Complementary Health Approaches: United States, 2012. Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics, 2016.

Nahin, Richard L.,, Patricia M. Barnes, and Barbara J. Stussman. Expenditures On Complementary Health Approaches: United States, 2012. Hyattsville, MD: U.S. Department of Health and Human Services, Centers for Disease Control and Prevention, National Center for Health Statistics, 2016.