Witten, D. M. (1977). Clinical urography (4 ed.). Saunders Company.
Lua i Stíl Chicago (17ú heag.)Witten, David M. Clinical Urography. 4 ed. Estados Unidos: Saunders Company, 1977.
Lua MLA (9ú heag.)Witten, David M. Clinical Urography. 4 ed. Saunders Company, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.