Dyfyniad APA

Wonnacott, T. H., & Wonnacott, R. J. (1990). Introductory statistics (5th ed.). Wiley.

Dyfyniad Arddull Chicago

Wonnacott, Thomas H., and Ronald J. Wonnacott. Introductory Statistics. 5th ed. New York: Wiley, 1990.

Dyfyniad MLA

Wonnacott, Thomas H., and Ronald J. Wonnacott. Introductory Statistics. 5th ed. Wiley, 1990.

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