Langan, J. (2001). Sentence skills with readings (second edition.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Langan, John. Sentence Skills with Readings. second edition. Boston: McGraw-Hill, 2001.
Lua MLA (8ú heag.)Langan, John. Sentence Skills with Readings. second edition. McGraw-Hill, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.