Não informado. (1971). Quality Management and Engineering. Hitchcock Publishing.
Lua i Stíl Chicago (17ú heag.)Não informado. Quality Management and Engineering. Wheaton, Ill: Hitchcock Publishing, 1971.
Lua MLA (8ú heag.)Não informado. Quality Management and Engineering. Hitchcock Publishing, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.