Gupta S.P. (2014). Statistical Methods (NA.). Sultan Chand & Sons.
Chicago-čujuhus (17. p.)Gupta S.P. Statistical Methods. NA. New Delhi: Sultan Chand & Sons, 2014.
MLA-čujuhus (9. p.)Gupta S.P. Statistical Methods. NA. Sultan Chand & Sons, 2014.
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