SMID,P. (2005). CNC PROGRAMMING TECHNIQUES. INDUSTRIAL PRESS INC.
Lua i Stíl Chicago (17ú heag.)SMID,P. CNC PROGRAMMING TECHNIQUES. NEW-YORK: INDUSTRIAL PRESS INC, 2005.
Lua MLA (9ú heag.)SMID,P. CNC PROGRAMMING TECHNIQUES. INDUSTRIAL PRESS INC, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.