(1963). Monthly Bulletin of Statistics.
Lua i Stíl Chicago (17ú heag.)Monthly Bulletin of Statistics. 1963.
Lua MLA (9ú heag.)Monthly Bulletin of Statistics. 1963.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)