%% You should probably cite draft-ietf-dnsop-edns-client-subnet instead of this I-D.
@techreport{vandergaast-edns-client-subnet-01,
    number =    {draft-vandergaast-edns-client-subnet-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-vandergaast-edns-client-subnet/01/},
    author =    {Carlo Contavalli and Wilmer van der Gaast and Sean Leach and Edward P. Lewis},
    title =     {{Client subnet in DNS requests}},
    pagetotal = 32,
    year =      2012,
    month =     apr,
    day =       25,
    abstract =  {This draft defines an EDNS0 extension to carry information about the network that originated a DNS query, and the network for which the subsequent reply can be cached.},
}