Johnson, R. R. (1976). Elementary statistics (2nd ed.). Duxbury.
Chicago-čujuhus (17. p.)Johnson, Robert R. Elementary Statistics. 2nd ed. Massachusetts: Duxbury, 1976.
MLA-čujuhus (9. p.)Johnson, Robert R. Elementary Statistics. 2nd ed. Duxbury, 1976.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.