APA-čujuhus (7. p.)

Levy, P. S. (1991). Sampling of populations: Methods and applications. Wiley.

Chicago-čujuhus (17. p.)

Levy, Paul S. Sampling of Populations: Methods and Applications. New York: Wiley, 1991.

MLA-čujuhus (9. p.)

Levy, Paul S. Sampling of Populations: Methods and Applications. Wiley, 1991.

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