Cunningham, F. G. (2011). Williams Obstetricia <i>es</i>.
Lua i Stíl Chicago (17ú heag.)Cunningham, F. Gary. Williams Obstetricia <i>es</i>. 2011.
Lua MLA (9ú heag.)Cunningham, F. Gary. Williams Obstetricia <i>es</i>. 2011.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.