Heimer, R. T., & Trueblood, C. R. (1977). Strategies for teaching children mathematics. Addison-Wesley Pub. Co..
芝加哥风格引文Heimer, Ralph T., 与 Cecil R. Trueblood. Strategies for Teaching Children Mathematics. Reading, Mass.: Addison-Wesley Pub. Co., 1977.
MLA引文Heimer, Ralph T., 与 Cecil R. Trueblood. Strategies for Teaching Children Mathematics. Addison-Wesley Pub. Co., 1977.
警告：这些引文格式不一定是100％准确.