Howard, J. (1986). Heart disease. Springhouse.
Lua i Stíl Chicago (17ú heag.)Howard, Judd. Heart Disease. Springhouse, Pa: Springhouse, 1986.
Lua MLA (9ú heag.)Howard, Judd. Heart Disease. Springhouse, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.