Dyfyniad APA

Levin, J., Fox, J. A., & Forde, D. R. (2010). Elementary statistics in social research (11th ed.). Allyn and Bacon.

Dyfyniad Arddull Chicago

Levin, Jack, James Alan Fox, and David R. Forde. Elementary Statistics in Social Research. 11th ed. Boston: Allyn and Bacon, 2010.

Dyfyniad MLA

Levin, Jack, et al. Elementary Statistics in Social Research. 11th ed. Allyn and Bacon, 2010.

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