Dyfyniad APA

Downie, N. M., & Heath, R. W. (1974). Basic statistical methods (4th ed.). Harper & Row.

Dyfyniad Arddull Chicago

Downie, N. M., and R W. Heath. Basic Statistical Methods. 4th ed. New York: Harper & Row, 1974.

Dyfyniad MLA

Downie, N. M., and R W. Heath. Basic Statistical Methods. 4th ed. Harper & Row, 1974.

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