Sommerfeld, R. M. (1987). Federal taxes and management decisions (1987-88 ed.). Irwin.
芝加哥风格引文Sommerfeld, Raynard M. Federal Taxes and Management Decisions. 1987-88 ed. Homewood, Ill: Irwin, 1987.
MLA引文Sommerfeld, Raynard M. Federal Taxes and Management Decisions. 1987-88 ed. Irwin, 1987.
警告：这些引文格式不一定是100％准确.