Gupta, S. P. (1995). Practical Statistics. S. Chand & Company.
Cita Chicago (17th ed.)Gupta, S. P. Practical Statistics. New Delhi: S. Chand & Company, 1995.
Cita MLA (9th ed.)Gupta, S. P. Practical Statistics. S. Chand & Company, 1995.
Atenció: Aquestes cites poden no estar 100% correctes.