(1994). Mathematics teaching in the middle school. National Council of Teachers of Mathematics.
Cita Chicago (17th ed.)Mathematics Teaching in the Middle School. Reston, VA: National Council of Teachers of Mathematics, 1994.
Cita MLA (9th ed.)Mathematics Teaching in the Middle School. National Council of Teachers of Mathematics, 1994.
Atenció: Aquestes cites poden no estar 100% correctes.