Houghton Mifflin Company. (2002). Houghton Mifflin mathematics. Houghton Mifflin.
芝加哥风格引文Houghton Mifflin Company. Houghton Mifflin Mathematics. Boston: Houghton Mifflin, 2002.
MLA引文Houghton Mifflin Company. Houghton Mifflin Mathematics. Houghton Mifflin, 2002.
警告：这些引文格式不一定是100％准确.