MARFELS, W. (1982). Gas and arc welding: Revised to Indian standards. Wiley Eastern Limited.
Lua i Stíl Chicago (17ú heag.)MARFELS, W. Gas and Arc Welding: Revised to Indian Standards. New Dekhi: Wiley Eastern Limited, 1982.
Lua MLA (9ú heag.)MARFELS, W. Gas and Arc Welding: Revised to Indian Standards. Wiley Eastern Limited, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.