Singh, D. (1986). Theory and analysis of sample survey designs. Wiley.
Cita Chicago (17th ed.)Singh, Daroga. Theory and Analysis of Sample Survey Designs. New Delhi: Wiley, 1986.
Cita MLA (9th ed.)Singh, Daroga. Theory and Analysis of Sample Survey Designs. Wiley, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.