Preiss, S. (2009). NorthStar 5 (3rd edition.). Longman.
Lua i Stíl Chicago (17ú heag.)Preiss, Sherry. NorthStar 5. 3rd edition. White Plains, N.Y.: Longman, 2009.
Lua MLA (8ú heag.)Preiss, Sherry. NorthStar 5. 3rd edition. Longman, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.