Friedberg, C. K. (1966). Diseases of the heart.
Lua i Stíl Chicago (17ú heag.)Friedberg, Charles K. Diseases of the Heart. 1966.
Lua MLA (9ú heag.)Friedberg, Charles K. Diseases of the Heart. 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.