Gupta, S. (1981). Statistical methods/15e (15th ed.). Sulthan Chand & Sons.
Chicago Edition CitationGupta, S.P. Statistical Methods/15e. 15th ed. New Delhi: Sulthan Chand & Sons, 1981.
Cita MLAGupta, S.P. Statistical Methods/15e. 15th ed. Sulthan Chand & Sons, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.