%% You should probably cite rfc2017 instead of this I-D.
@techreport{ietf-mailext-acc-url-01,
    number =    {draft-ietf-mailext-acc-url-01},
    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-mailext-acc-url/01/},
    author =    {Ned Freed and Keith Moore},
    title =     {{Definition of the URL MIME External-Body Access-Type}},
    pagetotal = 5,
    year =      1995,
    month =     nov,
    day =       20,
    abstract =  {This memo defines a new access-type for message/external-body MIME parts for Uniform Resource Locators (URLs). {[}STANDARDS-TRACK{]}},
}