Snedecor, G. W., & Cochran, W. G. (1967). Statistical methods (6a. ed.). Iowa State University Press.
Chicago-čujuhus (17. p.)Snedecor, George Waddel, juo William Gemmell Cochran. Statistical Methods. 6a. ed. Ames: Iowa State University Press, 1967.
MLA-čujuhus (9. p.)Snedecor, George Waddel, juo William Gemmell Cochran. Statistical Methods. 6a. ed. Iowa State University Press, 1967.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.