Não informado. (2003). Concrete building and concret products. Cement and Concrete Association.
Cita Chicago Style (17a ed.)Não informado. Concrete Building and Concret Products. London: Cement and Concrete Association, 2003.
Cita MLA (8a ed.)Não informado. Concrete Building and Concret Products. Cement and Concrete Association, 2003.
Precaución: Estas citas no son 100% exactas.