Karlof, B. (1994). Bench Marking. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Karlof, Bengt. Bench Marking. John Wiley & Sons, 1994.
Lua MLA (8ú heag.)Karlof, Bengt. Bench Marking. John Wiley & Sons, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.