Barrett, J. L., Hannon, C., Keefe, L., Gortmaker, S. L., & Cradock, A. L. (2011). Playground Renovations and Quality at Public Parks in Boston, Massachusetts, 1996-2007. Centers for Disease Control and Prevention.

Barrett, Jessica L., Cynthia Hannon, Linda Keefe, Steven L. Gortmaker, und Angie L. Cradock. Playground Renovations and Quality At Public Parks in Boston, Massachusetts, 1996-2007. Centers for Disease Control and Prevention, 2011.

Barrett, Jessica L., et al. Playground Renovations and Quality At Public Parks in Boston, Massachusetts, 1996-2007. Centers for Disease Control and Prevention, 2011.