Besterfield, D. H. (1994). Quality control (1st edition.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Besterfield, D H. Quality Control. 1st edition. New York: Prentice-Hall, 1994.
Lua MLA (9ú heag.)Besterfield, D H. Quality Control. 1st edition. Prentice-Hall, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.