Campbell. (1988). Urologia.
Lua i Stíl Chicago (17ú heag.)Campbell. Urologia. 1988.
Lua MLA (9ú heag.)Campbell. Urologia. 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)