Pritchard, J. A. (1980). Obstetricia.
Lua i Stíl Chicago (17ú heag.)Pritchard, Jack A. Obstetricia. 1980.
Lua MLA (9ú heag.)Pritchard, Jack A. Obstetricia. 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)