%% You should probably cite rfc5668 instead of this I-D.
@techreport{ietf-l3vpn-as4octet-ext-community-03,
    number =    {draft-ietf-l3vpn-as4octet-ext-community-03},
    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-l3vpn-as4octet-ext-community/03/},
    author =    {Dan Tappan and Yakov Rekhter and Srihari R. Sangli},
    title =     {{4-Octet AS Specific BGP Extended Community}},
    pagetotal = 5,
    year =      2009,
    month =     mar,
    day =       26,
    abstract =  {This document defines a new type of a BGP extended community, which carries a 4-octet Autonomous System (AS) number. {[}STANDARDS-TRACK{]}},
}