Beard Roger. (2009). Sage Handbook of Writing Development. Sage.
Lua i Stíl Chicago (17ú heag.)Beard Roger. Sage Handbook of Writing Development. LONDON: Sage, 2009.
Lua MLA (9ú heag.)Beard Roger. Sage Handbook of Writing Development. Sage, 2009.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.