(1898). The gas engine. Gas Engine Pub. Co..
Lua i Stíl Chicago (17ú heag.)The Gas Engine. Cincinnati: Gas Engine Pub. Co., 1898.
Lua MLA (8ú heag.)The Gas Engine. Gas Engine Pub. Co., 1898.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.