Message format for computer-based message systems :
category, software standard, subcategory, interchange codes, media, and data files.

APA Citation

United States. National Bureau of Standards. (1983). Message format for computer-based message systems: category, software standard, subcategory, interchange codes, media, and data files. [Washington, D.C.?]: U.S. Dept. of Commerce, National Bureau of Standards .

MLA Citation

United States. National Bureau of Standards. Message Format for Computer-based Message Systems: Category, Software Standard, Subcategory, Interchange Codes, Media, And Data Files. [Washington, D.C.?]: U.S. Dept. of Commerce, National Bureau of Standards , 1983.

Warning: These citations may not always be complete (especially for serials).