APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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