%% You should probably cite rfc2586 instead of this I-D.
@techreport{alvestrand-audio-l16-01,
    number =    {draft-alvestrand-audio-l16-01},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-alvestrand-audio-l16/01/},
    author =    {Harald T. Alvestrand and James Salsman},
    title =     {{The Audio/L16 MIME content type}},
    pagetotal = 5,
    year =      1999,
    month =     feb,
    day =       5,
    abstract =  {This document defines the audio/L16 MIME type, a reasonable quality audio format for use in Internet applications. This memo provides information for the Internet community.},
}