Office of the Assistant Secretary for Planning and Evaluation (31 January 2011). "Poverty Guidelines, Research, and Measurement". Department of Health and Human Services. Archived from the original on 2 March 2011. Retrieved 2 August 2011.
Office of the Assistant Secretary for Planning and Evaluation (31 January 2011). "Poverty Guidelines, Research, and Measurement". Department of Health and Human Services. Archived from the original on 2 March 2011. Retrieved 2 August 2011.