Cohen, D. A., Han, B., Evenson, K. R., Nagel, C., McKenzie, T. L., Marsh, T., . . . Harnik, P. (2016). The Prevalence and Use of Walking Loops in Neighborhood Parks: A National Study. Environ Health Perspect.

Cohen, Deborah A., Bing Han, Kelly R. Evenson, Catherine Nagel, Thomas L. McKenzie, Terry Marsh, Stephanie Williamson, και Peter Harnik. "The Prevalence and Use of Walking Loops in Neighborhood Parks: A National Study." Environ Health Perspect 2016.

Cohen, Deborah A., et al. "The Prevalence and Use of Walking Loops in Neighborhood Parks: A National Study." Environ Health Perspect 2016.