Não informado. (1918). National Bureau of Standards Handbook. Government Printing Office.
Chicagoスタイル(17版)引用形式Não informado. National Bureau of Standards Handbook. Washington: Government Printing Office, 1918.
MLA(8版)引用形式Não informado. National Bureau of Standards Handbook. Government Printing Office, 1918.
警告: この引用は必ずしも正確ではありません.