National Council of Teachers of Mathematics. (1926). Yearbook. National Council of Teachers of Mathematics.
芝加哥风格引文National Council of Teachers of Mathematics. Yearbook. [Place of publication not identified]: National Council of Teachers of Mathematics, 1926.
MLA引文National Council of Teachers of Mathematics. Yearbook. National Council of Teachers of Mathematics, 1926.
警告：这些引文格式不一定是100％准确.