Dyfyniad APA

Levin, J., & Fox, J. A. (1997). Elementary statistics in social research (7th ed.). Longman.

Dyfyniad Arddull Chicago

Levin, Jack, and James Alan Fox. Elementary Statistics in Social Research. 7th ed. New York: Longman, 1997.

Dyfyniad MLA

Levin, Jack, and James Alan Fox. Elementary Statistics in Social Research. 7th ed. Longman, 1997.

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