Dyfyniad APA

Howell, D. C., & David C. Howell. (2007). Statistical methods for psychology. Australia,Belmont, CA: Thomson/Wadsworth.

Dyfyniad Arddull Chicago

Howell, David C., và David C. Howell. Statistical Methods for Psychology. Australia,Belmont, CA: Thomson/Wadsworth, 2007.

Dyfyniad MLA

Howell, David C., và David C. Howell. Statistical Methods for Psychology. Australia,Belmont, CA: Thomson/Wadsworth, 2007.

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