Dyfyniad APA

Gravetter, F. J., & Wallnau, L. B. (2013). Statistics for the behavioral sciences (9th ed.). Wadsworth Cengage Learning.

Dyfyniad Arddull Chicago

Gravetter, Frederick J., and Larry B. Wallnau. Statistics for the Behavioral Sciences. 9th ed. Belmont, CA: Wadsworth Cengage Learning, 2013.

Dyfyniad MLA

Gravetter, Frederick J., and Larry B. Wallnau. Statistics for the Behavioral Sciences. 9th ed. Wadsworth Cengage Learning, 2013.

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