FREUND, J. E. (1981). Modern elementary statistics.-- ed.5. Prentice-Hall of India.
Lua i Stíl Chicago (17ú heag.)FREUND, John E. Modern Elementary Statistics.-- Ed.5. New Delhi: Prentice-Hall of India, 1981.
Lua MLA (9ú heag.)FREUND, John E. Modern Elementary Statistics.-- Ed.5. Prentice-Hall of India, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.