Becker, W. (1969). Atlas de otorrinolaringologia.
Lua i Stíl Chicago (17ú heag.)Becker, Walter. Atlas De Otorrinolaringologia. 1969.
Lua MLA (9ú heag.)Becker, Walter. Atlas De Otorrinolaringologia. 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.