%% You should probably cite rfc7538 instead of this I-D.
@techreport{ietf-httpbis-rfc7238bis-03,
    number =    {draft-ietf-httpbis-rfc7238bis-03},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-ietf-httpbis-rfc7238bis/03/},
    author =    {Julian Reschke},
    title =     {{The Hypertext Transfer Protocol Status Code 308 (Permanent Redirect)}},
    pagetotal = 6,
    year =      2015,
    month =     feb,
    day =       5,
    abstract =  {This document specifies the additional Hypertext Transfer Protocol (HTTP) status code 308 (Permanent Redirect).},
}