Scheaffer, R. L. (1996). Elementary survey sampling 5th ed. Duxbury Press.
Cita Chicago Style (17a ed.)Scheaffer, Richard L. Elementary Survey Sampling 5th Ed. Duxbury Press, 1996.
Cita MLA (8a ed.)Scheaffer, Richard L. Elementary Survey Sampling 5th Ed. Duxbury Press, 1996.
Precaución: Estas citas no son 100% exactas.