Dyfyniad APA

Scheaffer, R. L., Mendenhall, W. I., Ott, R. L., & Gerow, K. G. (2012). Elementary survey sampling (7th ed.). Brooks/Cole, Cengage Learning.

Dyfyniad Arddull Chicago

Scheaffer, Richard L., William III Mendenhall, R. Lyman Ott, and Kenneth G. Gerow. Elementary Survey Sampling. 7th ed. Boston, MA: Brooks/Cole, Cengage Learning, 2012.

Dyfyniad MLA

Scheaffer, Richard L., et al. Elementary Survey Sampling. 7th ed. Brooks/Cole, Cengage Learning, 2012.

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