Bridges, R. (1920). From silver to steel: The romance of the Broken Hill Proprietary. George Robertson.
Lua i Stíl Chicago (17ú heag.)Bridges, Roy. From Silver to Steel: The Romance of the Broken Hill Proprietary. Melbourne: George Robertson, 1920.
Lua MLA (8ú heag.)Bridges, Roy. From Silver to Steel: The Romance of the Broken Hill Proprietary. George Robertson, 1920.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.