Dyfyniad APA

Downie, N., & Heath, R. W. (1970). Basic statistical methods (3rd ed.). Harper & Row.

Dyfyniad Arddull Chicago

Downie, N.M, and R. W. Heath. Basic Statistical Methods. 3rd ed. New York: Harper & Row, 1970.

Dyfyniad MLA

Downie, N.M, and R. W. Heath. Basic Statistical Methods. 3rd ed. Harper & Row, 1970.

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