Hornby, A. S. (2005). Oxford Advanced Learner's Compass. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Hornby, A. S. Oxford Advanced Learner's Compass. [Oxford]: Oxford University Press, 2005.
Lua MLA (9ú heag.)Hornby, A. S. Oxford Advanced Learner's Compass. Oxford University Press, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.