APA (7th ed.) Citation

United States. National Bureau of Standards. (1977). NBS guidelines for use of the metric system (Revised Aug. 1977, updated Nov. 1977.). Dept. of Commerce, National Bureau of Standards.

Chicago Style (17th ed.) Citation

United States. National Bureau of Standards. NBS Guidelines for Use of the Metric System. Revised Aug. 1977, updated Nov. 1977. [Washington]: Dept. of Commerce, National Bureau of Standards, 1977.

MLA (9th ed.) Citation

United States. National Bureau of Standards. NBS Guidelines for Use of the Metric System. Revised Aug. 1977, updated Nov. 1977. Dept. of Commerce, National Bureau of Standards, 1977.