Dyfyniad APA

Johnson, R. R. (1976). Elementary statistics (2nd ed.). Duxbury.

Dyfyniad Arddull Chicago

Johnson, Robert R. Elementary Statistics. 2nd ed. Massachusetts: Duxbury, 1976.

Dyfyniad MLA

Johnson, Robert R. Elementary Statistics. 2nd ed. Duxbury, 1976.

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