Snedecor, G. W., & Cochran, W. G. (1967). Statistical methods (6th edition.). Iowa State University Press.
Chicago-viite (17. p.)Snedecor, George Waddel, ja William Gemmell Cochran. Statistical Methods. 6th edition. Ames: Iowa State University Press, 1967.
MLA-viite (9. p.)Snedecor, George Waddel, ja William Gemmell Cochran. Statistical Methods. 6th edition. Iowa State University Press, 1967.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.