Levy, P. S. (1991). Sampling of populations: Methods and applications. Wiley.
Cita Chicago (17th ed.)Levy, Paul S. Sampling of Populations: Methods and Applications. New York: Wiley, 1991.
Cita MLA (9th ed.)Levy, Paul S. Sampling of Populations: Methods and Applications. Wiley, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.