Goodman, A., & Hirsch, L. (2000). Precalculus: Understanding functions. Brooks/Cole.
芝加哥风格引文Goodman, Arthur, 与 Lewis Hirsch. Precalculus: Understanding Functions. Pacific Grove, CA: Brooks/Cole, 2000.
MLA引文Goodman, Arthur, 与 Lewis Hirsch. Precalculus: Understanding Functions. Brooks/Cole, 2000.
警告：这些引文格式不一定是100％准确.