Van Pelt, Deani A. Neven; Sikkink, David; Pennings, Ray; & Seel, John. (2012). Private religious Protestant and Catholic Schools in the United States and Canada: Introduction, overview, and policy implications. Journal of School Choice: International Research and Reform, 6(1), 1-19. (Probably similar or same information as in Pennings, Seel, Van Pelt, Sikkink, & Wiens, 2011,