APA aipamena

Scheaffer, R. L. (1979). Elementary survey sampling. Duxbury Press.

Chicago Style aipamena

Scheaffer, Richard L. Elementary Survey Sampling. Duxbury Press, 1979.

MLA aipamena

Scheaffer, Richard L. Elementary Survey Sampling. Duxbury Press, 1979.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.