Spurr, W. A. (1961). Business and economic statistics (Rev, [i.e. 2d].). Irwin.
Citación estilo ChicagoSpurr, William Alfred. Business and Economic Statistics. Rev, [i.e. 2d]. Homewood, Illinois: Irwin, 1961.
Cita MLASpurr, William Alfred. Business and Economic Statistics. Rev, [i.e. 2d]. Irwin, 1961.
Warning: These citations may not always be 100% accurate.