APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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