Power engineering international. PennWell Pub. Co.
Lua i Stíl Chicago (17ú heag.)Power Engineering International. Tulsa: PennWell Pub. Co.
Lua MLA (9ú heag.)Power Engineering International. PennWell Pub. Co.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.