Utts, J. M., & Heckard, R. F. (2006). Statistical ideas and methods. Thomson-Brooks/Cole.
Lua i Stíl Chicago (17ú heag.)Utts, Jessica M., agus R. F. Heckard. Statistical Ideas and Methods. Belmont, CA: Thomson-Brooks/Cole, 2006.
Lua MLA (9ú heag.)Utts, Jessica M., agus R. F. Heckard. Statistical Ideas and Methods. Thomson-Brooks/Cole, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.