%% You should probably cite draft-ietf-dnsop-onion-tld instead of this I-D.
@techreport{appelbaum-dnsop-onion-tld-01,
    number =    {draft-appelbaum-dnsop-onion-tld-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-appelbaum-dnsop-onion-tld/01/},
    author =    {Jacob Appelbaum and Alec Muffett},
    title =     {{The .onion Special-Use Domain Name}},
    pagetotal = 6,
    year =      2015,
    month =     apr,
    day =       14,
    abstract =  {This document registers the ".onion" Special-Use Domain Name.},
}