APA aipamena

Scheaffer, R. L. (1996). Elementary survey sampling 5th ed. Duxbury Press.

Chicago Style aipamena

Scheaffer, Richard L. Elementary Survey Sampling 5th Ed. Duxbury Press, 1996.

MLA aipamena

Scheaffer, Richard L. Elementary Survey Sampling 5th Ed. Duxbury Press, 1996.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.