Sherfield Robert M. Cornerstone Developing Soft Skills (4th.). Pearson.
Lua i Stíl Chicago (17ú heag.)Sherfield Robert M. Cornerstone Developing Soft Skills. 4th. Delhi Delhi: Pearson.
Lua MLA (9ú heag.)Sherfield Robert M. Cornerstone Developing Soft Skills. 4th. Pearson.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.