Não informado. Civil engineering. U.S. Department of Commerce, National Technical Information Service.
Citação do estilo Chicago (17ª ed.)Não informado. Civil Engineering. Springfield, Va: U.S. Department of Commerce, National Technical Information Service.
Citação MLA (8ª ed.)Não informado. Civil Engineering. U.S. Department of Commerce, National Technical Information Service.
警告:这些引文格式不一定是100%准确.