APA-referens (7:e uppl.)

Não informado. (1968). Government Reports Index. U.S. Department of Commerce, National Technical Information Service.

Chicago-referens (17:e uppl.)

Não informado. Government Reports Index. Washington: U.S. Department of Commerce, National Technical Information Service, 1968.

MLA-referens (8:e uppl.)

Não informado. Government Reports Index. U.S. Department of Commerce, National Technical Information Service, 1968.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.