Clarke, L. H., & Norton, F. G. J. (1984). Ordinary Level mathematics (7th ed.(revised).). Heinemann Educational.
芝加哥风格引文Clarke, L. Harwood, 与 F. G. J. Norton. Ordinary Level Mathematics. 7th ed.(revised). London: Heinemann Educational, 1984.
MLA引文Clarke, L. Harwood, 与 F. G. J. Norton. Ordinary Level Mathematics. 7th ed.(revised). Heinemann Educational, 1984.
警告：这些引文格式不一定是100％准确.