Harrison, M. (2001). CPE practice tests: Four new tests for the revised Cambridge Certificate of Proficiency in English. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Harrison, Mark. CPE Practice Tests: Four New Tests for the Revised Cambridge Certificate of Proficiency in English. Oxford: Oxford University Press, 2001.
Lua MLA (8ú heag.)Harrison, Mark. CPE Practice Tests: Four New Tests for the Revised Cambridge Certificate of Proficiency in English. Oxford University Press, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.