Wren, P. (2005). High School: English grammar & composition. S. Chand.
Lua i Stíl Chicago (17ú heag.)Wren, P.C. High School: English Grammar & Composition. New Delhi: S. Chand, 2005.
Lua MLA (8ú heag.)Wren, P.C. High School: English Grammar & Composition. S. Chand, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.