APA-referens (7:e uppl.)

Johnson, R. (1984). Elementary statistics (Fourth edition.). Duxbury Press.

Chicago-referens (17:e uppl.)

Johnson, Robert. Elementary Statistics. Fourth edition. Boston: Duxbury Press, 1984.

MLA-referens (8:e uppl.)

Johnson, Robert. Elementary Statistics. Fourth edition. Duxbury Press, 1984.