Shurter, R. (1982). Effective letters in business. Tata Mc Graw Hill.
芝加哥风格引文Shurter, Robert. Effective Letters in Business. New Delhi: Tata Mc Graw Hill, 1982.
MLA引文Shurter, Robert. Effective Letters in Business. Tata Mc Graw Hill, 1982.
警告：这些引文格式不一定是100％准确.