Witte, R. S. (1985). Statistics (2nd ed.). Holt, Rinehart.
Chicago-čujuhus (17. p.)Witte, Robert S. Statistics. 2nd ed. New York: Holt, Rinehart, 1985.
MLA-čujuhus (9. p.)Witte, Robert S. Statistics. 2nd ed. Holt, Rinehart, 1985.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.