Snedecor, G. W., & Cochran, W. G. (1967). Statistical methods (6th edition.). Iowa State University Press.
Citazione stile Chigago Style (17a edizione)Snedecor, George Waddel, e William Gemmell Cochran. Statistical Methods. 6th edition. Ames: Iowa State University Press, 1967.
Citatione MLA (9a ed.)Snedecor, George Waddel, e William Gemmell Cochran. Statistical Methods. 6th edition. Iowa State University Press, 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.