Letchford, S. (1977). Business mathematics and statistics (2nd.ed.). Donnington.
芝加哥风格引文Letchford, S. Business Mathematics and Statistics. 2nd.ed. London: Donnington, 1977.
MLA引文Letchford, S. Business Mathematics and Statistics. 2nd.ed. Donnington, 1977.
警告：这些引文格式不一定是100％准确.