(2003). Safety at work. Butterworth-Heinemann.
Lua i Stíl Chicago (17ú heag.)Safety at Work. Butterworth-Heinemann, 2003.
Lua MLA (8ú heag.)Safety at Work. Butterworth-Heinemann, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.