%% You should probably cite draft-ietf-idr-rt-derived-community instead of this I-D.
@techreport{zzhang-idr-rt-derived-community-01,
    number =    {draft-zzhang-idr-rt-derived-community-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-zzhang-idr-rt-derived-community/01/},
    author =    {Zhaohui (Jeffrey) Zhang},
    title =     {{Extended Communities Derived from Route Targets}},
    pagetotal = 4,
    year =      2021,
    month =     mar,
    day =       9,
    abstract =  {This document describes a way to derive an Extended Community from a Route Target and its use cases.},
}