Não informado. (1969). Research in Reproduction. International Planned Parenthood Federation.
Lua i Stíl Chicago (17ú heag.)Não informado. Research in Reproduction. London: International Planned Parenthood Federation, 1969.
Lua MLA (8ú heag.)Não informado. Research in Reproduction. International Planned Parenthood Federation, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.