Hayslett, H. (1981). Statistics: Made simple. Heinemann.
Lua i Stíl Chicago (17ú heag.)Hayslett, H.T. Statistics: Made Simple. London: Heinemann, 1981.
Lua MLA (9ú heag.)Hayslett, H.T. Statistics: Made Simple. Heinemann, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.