Gupta S.P. (2014). Statistical Methods (NA.). Sultan Chand & Sons.
Cita Chicago (17th ed.)Gupta S.P. Statistical Methods. NA. New Delhi: Sultan Chand & Sons, 2014.
Cita MLA (9th ed.)Gupta S.P. Statistical Methods. NA. Sultan Chand & Sons, 2014.
Atenció: Aquestes cites poden no estar 100% correctes.