Besterfield, D. H. (2003). Quality control (seventh edition.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Besterfield, Dale H. Quality Control. seventh edition. New Jersey: Prentice Hall, 2003.
Lua MLA (8ú heag.)Besterfield, Dale H. Quality Control. seventh edition. Prentice Hall, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.