SNEDECOR, G. W. (1967). Statistical methods. Iowa State University Press.
Cita Chicago (17th ed.)SNEDECOR, George W. Statistical Methods. Iowa: Iowa State University Press, 1967.
Cita MLA (9th ed.)SNEDECOR, George W. Statistical Methods. Iowa State University Press, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.