BielickS., ChandlerK. and BroughmanS. R (2001). Homeschooling in the United States: 1999 (NCES 2001-033) Washington, DC: National Center for Education Statistics.
2.
LinesP. M. (1999). Homeschoolers: Estimating Numbers and Growth. Washington, D.C.: Office of Education Research and Improvement, U.S. Department of Education.
3.
PutnamR. D. (2000). Rowling alone: The collapse and revival of American community. New York: Simon & Schuster.