Gupta, S. &. G. (2013). Business Statistics (6.). Hiamalaya Publishing House.
Cita Chicago (17th ed.)Gupta, S.C & Gupta,Indra. Business Statistics. 6. Mumbai: Hiamalaya Publishing House, 2013.
Cita MLA (9th ed.)Gupta, S.C & Gupta,Indra. Business Statistics. 6. Hiamalaya Publishing House, 2013.
Atenció: Aquestes cites poden no estar 100% correctes.