Johnson, R. (1996). Elementary statistics (7th ed.). Duxbury.
Chicago-čujuhus (17. p.)Johnson, Robert. Elementary Statistics. 7th ed. Belmont: Duxbury, 1996.
MLA-čujuhus (9. p.)Johnson, Robert. Elementary Statistics. 7th ed. Duxbury, 1996.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.