Spiegel, M. R., & Stephens, L. J. (2011). Schaum's outline statistics (4th ed.). McGraw-Hill.
Chicago Edition CitationSpiegel, Murray R., i Larry J. Stephens. Schaum's Outline Statistics. 4th ed. New Delhi: McGraw-Hill, 2011.
Cita MLASpiegel, Murray R., i Larry J. Stephens. Schaum's Outline Statistics. 4th ed. McGraw-Hill, 2011.
Atenció: Aquestes cites poden no estar 100% correctes.