Não informado. (1987). Industry & Higher Education. Butterworth Scientific.
Lua i Stíl Chicago (17ú heag.)Não informado. Industry & Higher Education. Surrey, Inglaterra: Butterworth Scientific, 1987.
Lua MLA (8ú heag.)Não informado. Industry & Higher Education. Butterworth Scientific, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.