National Research Council (U.S.). Mathematics Learning Study Committee, Kilpatrick, J., & Swafford, J. (2002). Helping children learn mathematics. National Academy Press.

National Research Council (U.S.). Mathematics Learning Study Committee, Jeremy Kilpatrick, and Jane Swafford. Helping Children Learn Mathematics. Washington, DC: National Academy Press, 2002.

National Research Council (U.S.). Mathematics Learning Study Committee, et al. Helping Children Learn Mathematics. National Academy Press, 2002.