Não informado. (1969). Ergonomics Abstracts. Birmingham University, Ergonomics Information Analysis Centre.
Lua i Stíl Chicago (17ú heag.)Não informado. Ergonomics Abstracts. Birmingham, Inglaterra: Birmingham University, Ergonomics Information Analysis Centre, 1969.
Lua MLA (8ú heag.)Não informado. Ergonomics Abstracts. Birmingham University, Ergonomics Information Analysis Centre, 1969.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.