APA استشهاد

Downie, N. M., & Heath, R. W. (1973). Basic statistical methods (4th ed.). Haroer & Row.

استشهاد بنمط شيكاغو

Downie, N. M., و R. W. Heath. Basic Statistical Methods. 4th ed. New York: Haroer & Row, 1973.

MLA استشهاد

Downie, N. M., و R. W. Heath. Basic Statistical Methods. 4th ed. Haroer & Row, 1973.