Dyfyniad APA

Downie, N. M., & Heath, R. W. Basic statistical methods (3rd ed.).

Dyfyniad Arddull Chicago

Downie, N M., and R W. Heath. Basic Statistical Methods. 3rd ed. New York.

Dyfyniad MLA

Downie, N M., and R W. Heath. Basic Statistical Methods. 3rd ed.

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