Não informado. (1918). National Bureau of Standards Handbook. Government Printing Office.
Style de citation Chicago (17e éd.)Não informado. National Bureau of Standards Handbook. Washington: Government Printing Office, 1918.
Style de citation MLA (8e éd.)Não informado. National Bureau of Standards Handbook. Government Printing Office, 1918.
Attention : ces citations peuvent ne pas être correctes à 100%.