.Couch, J. V. (1987). Fundamentals of statistics for the behavioral sciences (2nd ed.). .West Pub. Co.
Dyfyniad Arddull Chicago.Couch, James V. Fundamentals of Statistics for the Behavioral Sciences. 2nd ed. St. Paul: .West Pub. Co, 1987.
Dyfyniad MLA.Couch, James V. Fundamentals of Statistics for the Behavioral Sciences. 2nd ed. .West Pub. Co, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.