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Lua i Stíl Chicago (17ú heag.)Population Reference Bureau (Washington, D.C.). World Population Growth and Response, 1965-1975: A Decade of Global Action. Washington: Population Reference Bureau, 1976.
Lua MLA (9ú heag.)Population Reference Bureau (Washington, D.C.). World Population Growth and Response, 1965-1975: A Decade of Global Action. Population Reference Bureau, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.