BETHUNE JAMES D. (2013). ENGINEERING GRAPHICS WITH AUTO CAD. CLARENDON PRESS.
Lua i Stíl Chicago (17ú heag.)BETHUNE JAMES D. ENGINEERING GRAPHICS WITH AUTO CAD. NEW DELHI: CLARENDON PRESS, 2013.
Lua MLA (9ú heag.)BETHUNE JAMES D. ENGINEERING GRAPHICS WITH AUTO CAD. CLARENDON PRESS, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.