SACK, S. M., & STEINBERG, H. J. (1981). The salesperson's legal guide. Prentice-Hall.
芝加哥风格引文SACK, Steven Mitchell, 与 Howard Jay STEINBERG. The Salesperson's Legal Guide. New Jersey: Prentice-Hall, 1981.
MLA引文SACK, Steven Mitchell, 与 Howard Jay STEINBERG. The Salesperson's Legal Guide. Prentice-Hall, 1981.
警告：这些引文格式不一定是100％准确.