Cita APA (7th ed.)
ebrary, Inc, Kilpatrick, J., Swafford, J., & Findell, B. (2001). Adding it up: Helping children learn mathematics. National Academy Press.
Cita Chicago (17th ed.)
ebrary, Inc, Jeremy Kilpatrick, Jane Swafford, i Bradford Findell. Adding It Up: Helping Children Learn Mathematics. Washington, DC: National Academy Press, 2001.
Cita MLA (9th ed.)
ebrary, Inc, et al. Adding It Up: Helping Children Learn Mathematics. National Academy Press, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.