Erricken, B. (1971). Advance general statistics. Eng. Univ. Press.
Lua i Stíl Chicago (17ú heag.)Erricken, B. Advance General Statistics. London: Eng. Univ. Press, 1971.
Lua MLA (9ú heag.)Erricken, B. Advance General Statistics. Eng. Univ. Press, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.