National Council of Teachers of Mathematics. (1960). Instruction in arithmetic. National Council of Teachers of Mathematics.
芝加哥风格引文National Council of Teachers of Mathematics. Instruction in Arithmetic. Washington, D.C.: National Council of Teachers of Mathematics, 1960.
MLA引文National Council of Teachers of Mathematics. Instruction in Arithmetic. National Council of Teachers of Mathematics, 1960.
警告：这些引文格式不一定是100％准确.