%% You should probably cite rfc2167 instead of this I-D.
@techreport{rfced-info-williamson-00,
    number =    {draft-rfced-info-williamson-00},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-rfced-info-williamson/00/},
    author =    {Mark Kosters and Jasdip Singh and Scott Williamson and Koert Zeilstra},
    title =     {{Referral Whois (RWhois) Protocol V1.5}},
    pagetotal = 69,
    year =      1997,
    month =     apr,
    day =       29,
    abstract =  {This memo describes Version 1.5 of the client/server interaction of RWhois. RWhois provides a distributed system for the discovery, retrieval, and maintenance of directory information. This memo provides information for the Internet community. This memo does not specify an Internet standard of any kind.},
}