Nickels, W. G., McHugh, J. M., & McHugh, S. M. (1999). Understanding business (5th ed.). Irwin/McGraw-Hill.
芝加哥风格引文Nickels, William G., James M. McHugh, 与 Susan M. McHugh. Understanding Business. 5th ed. Boston: Irwin/McGraw-Hill, 1999.
MLA引文Nickels, William G., et al. Understanding Business. 5th ed. Irwin/McGraw-Hill, 1999.
警告：这些引文格式不一定是100％准确.