APA استشهاد

Downie, N. M., & Heath, R. W. (1974). Basic statistical methods (4th ed.). Harper & Row.

استشهاد بنمط شيكاغو

Downie, N. M., و R W. Heath. Basic Statistical Methods. 4th ed. New York: Harper & Row, 1974.

MLA استشهاد

Downie, N. M., و R W. Heath. Basic Statistical Methods. 4th ed. Harper & Row, 1974.