LANGAN, J. College Writing Skills with Readings. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)LANGAN, John. College Writing Skills with Readings. McGraw-Hill.
Lua MLA (8ú heag.)LANGAN, John. College Writing Skills with Readings. McGraw-Hill.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.