Bridges, R. (1920). From silver to steel: The romance of the Broken Hill Proprietary. George Robertson.
Cita Chicago (17th ed.)Bridges, Roy. From Silver to Steel: The Romance of the Broken Hill Proprietary. Melbourne: George Robertson, 1920.
Cita MLA (8th ed.)Bridges, Roy. From Silver to Steel: The Romance of the Broken Hill Proprietary. George Robertson, 1920.
Atenció: Aquestes cites poden no estar 100% correctes.