Cunningham, F. G. (2006). Obstetricia de Williams (22 ed.). McGraw - Hill.
Lua i Stíl Chicago (17ú heag.)Cunningham, F. Gary. Obstetricia De Williams. 22 ed. México, D.F: McGraw - Hill, 2006.
Lua MLA (9ú heag.)Cunningham, F. Gary. Obstetricia De Williams. 22 ed. McGraw - Hill, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.