1. Private schools and public policy: New evidence on cognitive achievement in public and private schools;Alexander;Sociology of Education,1983
2. American Montessori Society 2015 History of AMS https://amshq.org/About-AMS/Who-We-Are/History-of-AMS
3. Arizona Christian School Tuition Organization v. Winn 2011
4. Association of Christian Schools International 2015 About ACSI & Membership https://www.acsi.org/about-acsi-and-membership