John J. Patrick, Richard M. Pious, and Donald A. Ritchie. "Department of Health and Human Services." The Oxford Guide to the United States Government. 2001. Encyclopedia.com. 16 Dec. 2009 <http://www.encyclopedia.com>.
John J. Patrick, Richard M. Pious, and Donald A. Ritchie. "Department of Health and Human Services." The Oxford Guide to the United States Government. 2001. Encyclopedia.com. (December 16, 2009). http://www.encyclopedia.com/doc/1O89-DepartmentfHlthndHmnSrvcs.html
John J. Patrick, Richard M. Pious, and Donald A. Ritchie. "Department of Health and Human Services." The Oxford Guide to the United States Government. 2001. Retrieved December 16, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O89-DepartmentfHlthndHmnSrvcs.html