Não informado. (1975). Draper world population fund report. Population Crisis Committee.
Lua i Stíl Chicago (17ú heag.)Não informado. Draper World Population Fund Report. Washington: Population Crisis Committee, 1975.
Lua MLA (8ú heag.)Não informado. Draper World Population Fund Report. Population Crisis Committee, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.