Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.