Não informado. (1968). Government Reports Index. U.S. Department of Commerce, National Technical Information Service.
Style de citation Chicago (17e éd.)Não informado. Government Reports Index. Washington: U.S. Department of Commerce, National Technical Information Service, 1968.
Style de citation MLA (8e éd.)Não informado. Government Reports Index. U.S. Department of Commerce, National Technical Information Service, 1968.
Attention : ces citations peuvent ne pas être correctes à 100%.