Williams, Jeffrey M., Susan H. Landry, Jason L. Anthony, Paul R. Swank, and April D. Crawford. “An Empirically-Based Statewide System for Identifying Quality Pre-Kindergarten Programs”. Education Policy Analysis Archives 20 (June 20, 2012): 17. Accessed January 27, 2023. https://epaa.asu.edu/index.php/epaa/article/view/1014.