World Fertility Survey & International Statistical Institute. (1975). Basic documentation. International Statistical Institute.
Lua i Stíl Chicago (17ú heag.)World Fertility Survey agus International Statistical Institute. Basic Documentation. Voorburg, Netherlands: International Statistical Institute, 1975.
Lua MLA (8ú heag.)World Fertility Survey agus International Statistical Institute. Basic Documentation. International Statistical Institute, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.