Não informado. (1959). British journal of non-destructive testing. Non-Destructive Testing Society of Great Britain.
Lua i Stíl Chicago (17ú heag.)Não informado. British Journal of Non-destructive Testing. Leigh-on-Sea, Inglaterra: Non-Destructive Testing Society of Great Britain, 1959.
Lua MLA (8ú heag.)Não informado. British Journal of Non-destructive Testing. Non-Destructive Testing Society of Great Britain, 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.