Spurr, W. A. (1961). Business and economic statistics (Rev, [i.e. 2d].). Irwin.
芝加哥风格引文Spurr, William Alfred. Business and Economic Statistics. Rev, [i.e. 2d]. Homewood, Illinois: Irwin, 1961.
MLA引文Spurr, William Alfred. Business and Economic Statistics. Rev, [i.e. 2d]. Irwin, 1961.
警告：这些引文格式不一定是100％准确.