Wren, P. (1971). High school English grammer and composition (82nd edn.). K & J Cooper publication.
Lua i Stíl Chicago (17ú heag.)Wren, P.C. High School English Grammer and Composition. 82nd edn. Mumbai: K & J Cooper publication, 1971.
Lua MLA (9ú heag.)Wren, P.C. High School English Grammer and Composition. 82nd edn. K & J Cooper publication, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.