Spurr, W. A. (1961). Business and economic statistics (Rev, [i.e. 2d].). Irwin.
Chicagoスタイル(17版)引用形式Spurr, William Alfred. Business and Economic Statistics. Rev, [i.e. 2d]. Homewood, Illinois: Irwin, 1961.
MLA(9版)引用形式Spurr, William Alfred. Business and Economic Statistics. Rev, [i.e. 2d]. Irwin, 1961.
警告: この引用は必ずしも正確ではありません.