%% You should probably cite rfc6585 instead of this I-D.
@techreport{nottingham-http-new-status-04,
    number =    {draft-nottingham-http-new-status-04},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-nottingham-http-new-status/04/},
    author =    {Roy T. Fielding and Mark Nottingham},
    title =     {{Additional HTTP Status Codes}},
    pagetotal = 10,
    year =      2012,
    month =     feb,
    day =       3,
    abstract =  {This document specifies additional HyperText Transfer Protocol (HTTP) status codes for a variety of common situations. {[}STANDARDS-TRACK{]}},
}