Não informado. (1972). Abortion Surveillance. Center for Disease Control.
Lua i Stíl Chicago (17ú heag.)Não informado. Abortion Surveillance. Atlanta, Ga: Center for Disease Control, 1972.
Lua MLA (8ú heag.)Não informado. Abortion Surveillance. Center for Disease Control, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.