Riebel, J. (1953). How to write successful business letters. D.D. Taraporewala.
芝加哥风格引文Riebel, J. How to Write Successful Business Letters. Bombay: D.D. Taraporewala, 1953.
MLA引文Riebel, J. How to Write Successful Business Letters. D.D. Taraporewala, 1953.
警告：这些引文格式不一定是100％准确.