Coval Joshua. Williams, 2002. Harvard Business.
Lua i Stíl Chicago (17ú heag.)Coval Joshua. Williams, 2002. : Harvard Business.
Lua MLA (9ú heag.)Coval Joshua. Williams, 2002. Harvard Business.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.