Fitzsimmons. Service Management 7 /Ed. Tata McGraw Hill.
Lua i Stíl Chicago (17ú heag.)Fitzsimmons. Service Management 7 /Ed. Tata McGraw Hill.
Lua MLA (9ú heag.)Fitzsimmons. Service Management 7 /Ed. Tata McGraw Hill.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.