Dyfyniad APA

Snedecor, G. W., & Cochran, W. G. (1967). Statistical methods (6th edition.). Iowa State University Press.

Dyfyniad Arddull Chicago

Snedecor, George Waddel, and William Gemmell Cochran. Statistical Methods. 6th edition. Ames: Iowa State University Press, 1967.

Dyfyniad MLA

Snedecor, George Waddel, and William Gemmell Cochran. Statistical Methods. 6th edition. Iowa State University Press, 1967.

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