Phillips A, Riddle I, Sands M. Connecting the dots. 2nd ed. Center for Disabilities Studies, University of Delaware, Newark, DE. 2011.
Riddle IK, Romelczyk S, Sparling E. Effective communication for health care providers. A guide for caring for individuals with disabilities. Center for Disabilities Studies, University of Delaware, Newark, DE. 2011.
Tressel P, Romelczyk S, Riddle IK, Sparling, E. Disability and health in Delaware. Delaware Behavioral Risk Factor Surveillance System, 2009 select data. Center for Disabilities Studies, University of Delaware, Newark, DE. 2011.
Galonsky P, Riddle IK, Romelczyk S, Sparling E, Tressell P. Health and disability in Delaware. 2008 Behavioral Risk Factor Surveillance System. Center for Disabilities Studies, University of Delaware, Newark, DE. 2010.
Riddle IK, Sparling E. Healthy Delawareans with Disabilities: A plan for action. A strategic plan for Delaware to promote health and prevent secondary health conditions in individuals with disabilities. Center for Disabilities Studies, University of Delaware, Newark, DE. 2009.
Riddle IK. Delaware health status report for children with disabilities and special health care needs. Center for Disabilities Studies, University of Delaware, Newark, DE. 2008.
Riddle IK. Delaware health status report for adults with disabilities. Center for Disabilities Studies, University of Delaware, Newark, DE. 2007.
Riddle IK. Delaware transition initiative. The Alfred I. duPont Hospital for Children transition survey project. Final report. Center for Disabilities Studies, University of Delaware, Newark, DE. 2007.