Não informado. (1969). Family Planning Perspectives. Allan Guttmacher Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Family Planning Perspectives. New York: Allan Guttmacher Institute, 1969.
Lua MLA (8ú heag.)Não informado. Family Planning Perspectives. Allan Guttmacher Institute, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.