%% You should probably cite rfc7613 instead of this I-D.
@techreport{ietf-precis-saslprepbis-09,
    number =    {draft-ietf-precis-saslprepbis-09},
    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-precis-saslprepbis/09/},
    author =    {Peter Saint-Andre and Alexey Melnikov},
    title =     {{Preparation, Enforcement, and Comparison of Internationalized Strings Representing Usernames and Passwords}},
    pagetotal = 19,
    year =      2014,
    month =     oct,
    day =       24,
    abstract =  {This document describes methods for handling Unicode strings representing usernames and passwords. This document obsoletes RFC 4013.},
}