414079 Scheaffer, R. L., Mendenhall, W., & Ott, L. (1979). Elementary survey sampling. North Scituate, MA : Duxbury Press.
Chicago-čujuhus (17. p.)414079 Scheaffer, Richard L., William Mendenhall, juo Lyman Ott. Elementary Survey Sampling. North Scituate, MA : Duxbury Press, 1979.
MLA-čujuhus (9. p.)414079 Scheaffer, Richard L., et al. Elementary Survey Sampling. North Scituate, MA : Duxbury Press, 1979.
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