A (somewhat) specific implementation of the Altman-King recommendation for data citations.
This site defines, in a somewhat more user-oriented way, a citation reference for data which follows the Altman/King recommendations (see the links below).
The NetCDF Classic and 64-bit Offset File Formats Standard has been formally recognized by the NASA SPG. In addition, two efforts are underway to recognize the CF Conventions as a formal NASA standard.