Cita APA (7th ed.)

National Research Council (U.S.). Mathematical Sciences Education Board & Steen, L. A. (1990). On the shoulders of giants: New approaches to numeracy. National Academy Press.

Cita Chicago (17th ed.)

National Research Council (U.S.). Mathematical Sciences Education Board i Lynn Arthur Steen. On the Shoulders of Giants: New Approaches to Numeracy. Washington, D.C.: National Academy Press, 1990.

Cita MLA (9th ed.)

National Research Council (U.S.). Mathematical Sciences Education Board i Lynn Arthur Steen. On the Shoulders of Giants: New Approaches to Numeracy. National Academy Press, 1990.