%% You should probably cite rfc1108 instead of this I-D.
@techreport{ietf-ahwgipso-ipso-01,
    number =    {draft-ietf-ahwgipso-ipso-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-ahwgipso-ipso/01/},
    author =    {},
    title =     {{U.S. Department of Defense Security Options for the Internet Protocol}},
    pagetotal = 17,
    year =      1991,
    month =     oct,
    day =       22,
    abstract =  {This RFC specifies the U.S. Department of Defense Basic Security Option and the top-level description of the Extended Security Option for use with the Internet Protocol. This RFC obsoletes RFC 1038, "Revised IP Security Option", dated January 1988. {[}STANDARDS-TRACK{]}},
}