Cooper, H. L. (2008). The obsolete class. Lulu Inc..
Lua i Stíl Chicago (17ú heag.)Cooper, Harvey L. The Obsolete Class. Lulu Inc., 2008.
Lua MLA (8ú heag.)Cooper, Harvey L. The Obsolete Class. Lulu Inc., 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.