Cement and Concrete Association of Australia. (1974). The safety shape. Cement and Concrete Association of Australia.
Cita Chicago (17th ed.)Cement and Concrete Association of Australia. The Safety Shape. [Sydney]: Cement and Concrete Association of Australia, 1974.
Cita MLA (8th ed.)Cement and Concrete Association of Australia. The Safety Shape. Cement and Concrete Association of Australia, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.