Clegg, F. (1990). Simple statistics: A course book for the social sciences. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Clegg, Frances. Simple Statistics: A Course Book for the Social Sciences. London: Cambridge University Press, 1990.
Lua MLA (9ú heag.)Clegg, Frances. Simple Statistics: A Course Book for the Social Sciences. Cambridge University Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.