World Fertility Survey & International Statistical Institute. (1973). Occasional papers. International Statistical Institute.
Lua i Stíl Chicago (17ú heag.)World Fertility Survey agus International Statistical Institute. Occasional Papers. Voorburg: International Statistical Institute, 1973.
Lua MLA (8ú heag.)World Fertility Survey agus International Statistical Institute. Occasional Papers. International Statistical Institute, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.