Schliemann, A.D., and Acioly, N.M. (1989). Mathematical knowledge developed at work: The contribution of practice versus the contribution of schooling. Cognition and Instruction, 6, 185-221.

Secretary's Commission on Achieving Necessary Skills. (1991). What work requires of schools: A SCANS Report for America 2000. Washington, D.C.: US Dept. of Labor.

Senechal, Majorie (1990) "Shape" In L.A. Steen (Ed.) On the shoulders of giants: New approaches to numeracy. Washington, DC: National Academy Press.

Statistics Canada and The Organisation for Economic Cooperation and Development. (1996). Literacy, economy, and society: First results from the International Adult Literacy Survey. Ottawa: Author.

Statistics Canada, and Organisation for Economic Cooperation and Development. (1997). Literacy skills for the knowledge society: Further results from the International Adult Literacy Survey. Ottawa: Author.

Steen, L.A. (Ed). (1990). On the shoulders of giants: New approaches to numeracy. Washington, DC: National Research Council.

Steen, L.A. (Ed). (1997). Why numbers count: quantitative literacy for tomorrow's America. New York: The College Board.

Stein, S.G. (1995). Equipped for the future: A customer-driven vision for adult literacy and lifelong learning. Washington, DC: National Institute for Literacy.

Tobias, S. (1993). Overcoming math anxiety. New York: Norton.

Willis, S. (1990). Being numerate: What counts? Victoria: Australian Council for Educational Research (ACER).