%% You should probably cite rfc6709 instead of this I-D.
@techreport{iab-extension-recs-17,
    number =    {draft-iab-extension-recs-17},
    type =      {Internet-Draft},
    institution =   {Internet Engineering Task Force},
    publisher = {Internet Engineering Task Force},
    note =      {Work in Progress},
    url =       {https://datatracker.ietf.org/doc/draft-iab-extension-recs/17/},
    author =    {Brian E. Carpenter and Dr. Bernard D. Aboba and Stuart Cheshire},
    title =     {{Design Considerations for Protocol Extensions}},
    pagetotal = 42,
    year =      2012,
    month =     jun,
    day =       27,
    abstract =  {This document discusses architectural issues related to the extensibility of Internet protocols, with a focus on design considerations. It is intended to assist designers of both base protocols and extensions. Case studies are included. A companion document, RFC 4775 (BCP 125), discusses procedures relating to the extensibility of IETF protocols. This document is not an Internet Standards Track specification; it is published for informational purposes.},
}