Crofton, W. M. (1918). The influenza epidemic.
Lua i Stíl Chicago (17ú heag.)Crofton, William M. The Influenza Epidemic. 1918.
Lua MLA (9ú heag.)Crofton, William M. The Influenza Epidemic. 1918.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
