%% You should probably cite draft-ietf-tls-external-psk-importer instead of this I-D.
@techreport{wood-tls-external-psk-importer-01,
    number =    {draft-wood-tls-external-psk-importer-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-wood-tls-external-psk-importer/01/},
    author =    {David Benjamin and Christopher A. Wood},
    title =     {{Importing External PSKs for TLS}},
    pagetotal = 7,
    year =      2019,
    month =     mar,
    day =       11,
    abstract =  {This document describes an interface for importing external PSK (Pre- Shared Key) into TLS.},
}