Não informado. (1968). Government Reports Index. U.S. Department of Commerce, National Technical Information Service.
Citação do estilo Chicago (17ª ed.)Não informado. Government Reports Index. Washington: U.S. Department of Commerce, National Technical Information Service, 1968.
Citação MLA (8ª ed.)Não informado. Government Reports Index. U.S. Department of Commerce, National Technical Information Service, 1968.
警告：這些引文格式不一定是100％准確.