Frailey L.E & Mamchak Susan. (1993). Hanbook of Business Letters (3rd Edition.). Super Book House.
芝加哥风格引文Frailey L.E 与 Mamchak Susan. Hanbook of Business Letters. 3rd Edition. Bombay: Super Book House, 1993.
MLA引文Frailey L.E 与 Mamchak Susan. Hanbook of Business Letters. 3rd Edition. Super Book House, 1993.
警告：这些引文格式不一定是100％准确.