David, F. N. (1953). A statistical primer.
Lua i Stíl Chicago (17ú heag.)David, Florence Nightingle. A Statistical Primer. London, 1953.
Lua MLA (9ú heag.)David, Florence Nightingle. A Statistical Primer. 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.