Halberg, C. J. A., & Devlin, J. F. (1967). Elementary functions. Scott, Foresman.
芝加哥风格引文Halberg, Charles J. A., 与 John F. Devlin. Elementary Functions. Atlanta: Scott, Foresman, 1967.
MLA引文Halberg, Charles J. A., 与 John F. Devlin. Elementary Functions. Scott, Foresman, 1967.
警告：这些引文格式不一定是100％准确.