Não informado. (1962). Quality. European Organization for Quality Control.
Lua i Stíl Chicago (17ú heag.)Não informado. Quality. Rotterdam, Holanda: European Organization for Quality Control, 1962.
Lua MLA (8ú heag.)Não informado. Quality. European Organization for Quality Control, 1962.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.