Gupta, S. (1977). Practical statistics. S. Chand & Co. Ltd.
Cita Chicago (17th ed.)Gupta, S. Practical Statistics. Delhi: S. Chand & Co. Ltd, 1977.
Cita MLA (9th ed.)Gupta, S. Practical Statistics. S. Chand & Co. Ltd, 1977.
Atenció: Aquestes cites poden no estar 100% correctes.