Miller, Cynthia, Johannes M. Bos, Kristin E. Porter, Fannie M. Tseng, and Yasuyo Abe (2005). The challenge of repeating success in a changing world: Final report on the Center for Employment Training replication sites, ETAOP 2006-04, Washington, DC: Employment and Training Administration, U.S. Department of Labor. Available at https://www.mdrc.org/sites/default/files/full_530.pdf.