FREUND, J. E. (1988). Modern Elementary Statistics John E. Freund. Prentice - Hall.
Lua i Stíl Chicago (17ú heag.)FREUND, John E. Modern Elementary Statistics John E. Freund. Prentice - Hall, 1988.
Lua MLA (8ú heag.)FREUND, John E. Modern Elementary Statistics John E. Freund. Prentice - Hall, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.