Cunningham, F. G. (2006). Obstetricia de Williams.
Lua i Stíl Chicago (17ú heag.)Cunningham, F. Gary. Obstetricia De Williams. 2006.
Lua MLA (9ú heag.)Cunningham, F. Gary. Obstetricia De Williams. 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.