%% You should probably cite draft-weaver-cellar-flac instead of this I-D.
@techreport{xiph-cellar-flac-00,
    number =    {draft-xiph-cellar-flac-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-xiph-cellar-flac/00/},
    author =    {Josh Coalson \textless{}\textgreater{}},
    title =     {{Free Lossless Audio Codec}},
    pagetotal = 31,
    year =      2017,
    month =     jun,
    day =       5,
    abstract =  {This document defines FLAC, which stands for Free Lossless Audio Codec, a free, open source codec for lossless audio compression and decompression.},
}