Não informado. (1968). Government Reports Index. U.S. Department of Commerce, National Technical Information Service.
Chicagoスタイル(17版)引用形式Não informado. Government Reports Index. Washington: U.S. Department of Commerce, National Technical Information Service, 1968.
MLA(8版)引用形式Não informado. Government Reports Index. U.S. Department of Commerce, National Technical Information Service, 1968.
警告: この引用は必ずしも正確ではありません.