Goodman, R. (1950). Controlled selection: A technique in probability sampling. Survey Research Center, University of Michigan.
Chicago-viite (17. p.)Goodman, Roe. Controlled Selection: A Technique in Probability Sampling. Ann Arbor, Mich: Survey Research Center, University of Michigan, 1950.
MLA-viite (9. p.)Goodman, Roe. Controlled Selection: A Technique in Probability Sampling. Survey Research Center, University of Michigan, 1950.
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