Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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