1. US Department of Agriculture. WIC program participation and costs. Washington, DC: US Department of Agriculture; 2019. https://www.fns.usda.gov/sites/default/files/pd/wisummary.pdf. Accessed March 6, 2019.
2. Thorn B, Kline N, Tadler C, et al. WIC Participant and Program Characteristics 2016. Alexandria, VA: US Department of Agriculture, Food and Nutrition Service; 2016. https://www.fns.usda.gov/wic/wic-participant-and-program-characteristics-2016. Accessed March 6, 2019.
3. Jacknowitz A, Tiehen L. WIC participation patterns: an investigation of delayed entry and early exit. 2010. ERR-109. US Department of Agriculture, Economic Research Service.https://www.ers.usda.gov/publications/pub-details/?pubid=44783. Accessed March 6, 2019.
4. Why do WIC participants fail to pick up their checks? An urban study in the wake of welfare reform;Rosenberg;Am J Public Health,2003
5. Barriers to the use of WIC services;Woelfel;J Am Diet Assoc,2004