Não informado. (2002). ACOG Practice Bulletin. American College of Obstetricians and Gynecologists.
Lua i Stíl Chicago (17ú heag.)Não informado. ACOG Practice Bulletin. Washington: American College of Obstetricians and Gynecologists, 2002.
Lua MLA (8ú heag.)Não informado. ACOG Practice Bulletin. American College of Obstetricians and Gynecologists, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.